Reports.QProxQT140 History

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Deleted lines 323-327:


[[Attach:QproxTestChart.gif]]
Still to come…
Changed line 84 from:
(:cellnr:) '''Capacitor (Cs) Value''''
to:
(:cellnr:) '''Capacitor (Cs) Value'''
Changed lines 95-103 from:
(:cell:) .0047K'''
(:cell:) 223K'''
(:cell:) 473J'''
(:cell:) 104M'''
(:cell:) 154M'''
(:cell:) 224K'''
(:cell:) 1.0K'''
to:
(:cell:) '''.0047K'''
(:cell:) '''223K'''
(:cell:) '''473J'''
(:cell:) '''104M'''
(:cell:) '''154M'''
(:cell:) '''224K'''
(:cell:) '''1.0K'''
Changed lines 154-155 from:
(:cellnr:) Stranded Conductor 16 Awg copper
12" long, straight, insulated
to:
(:cellnr:) Stranded Conductor 16 Awg copper 12" long, straight, insulated
Changed lines 164-165 from:
(:cellnr:) Stranded Conductor 16 Awg copper
12" long, straight, uninsulated
to:
(:cellnr:) Stranded Conductor 16 Awg copper 12" long, straight, uninsulated
Changed lines 204-205 from:
(:cellnr:) Salt Water (NaCl) Filled 1/16"
Silicon Tube, 48" long
to:
(:cellnr:) Salt Water (NaCl) Filled 1/16" Silicon Tube, 48" long
Changed lines 214-215 from:
(:cellnr:) Salt Water (NaCl) Filled 3/8" Silicon
Tube, 48" long
to:
(:cellnr:) Salt Water (NaCl) Filled 3/8" Silicon Tube, 48" long
Changed lines 224-225 from:
(:cellnr:) Sea Salt Water (KCl) Filled 1/16"
Silicon Tube, 48" long
to:
(:cellnr:) Sea Salt Water (KCl) Filled 1/16" Silicon Tube, 48" long
Changed lines 84-104 from:
(:cellnr:) Capacitor (Cs) Value
(:cell:) 4.86nF
(:cell:) 22.6nF
(:cell:) 49nF
(:cell:) 100nF
(:cell:) 150000pF
(:cell:) 221nF
(:cell:) 1µF


(:cellnr:) Capacitor Code
(:cell:) .0047K
(:cell:) 223K
(:cell:) 473J
(:cell:) 104M
(:cell:) 154M
(:cell:) 224K
(:cell:) 1.0K


(:cellnr:) material (Cx)
to:
(:cellnr:) '''Capacitor (Cs) Value''''
(:cell:) '''4.86nF'''
(:cell:) '''22.6nF'''
(:cell:) '''49nF'''
(:cell:) '''100nF'''
(:cell:) '''150000pF'''
(:cell:) '''221nF'''
(:cell:) '''1µF'''


(:cellnr:) '''Capacitor Code'''
(:cell:) .0047K'''
(:cell:) 223K'''
(:cell:) 473J'''
(:cell:) 104M'''
(:cell:) 154M'''
(:cell:) 224K'''
(:cell:) 1.0K'''


(:cellnr:) '''material (Cx)'''
Changed lines 176-177 from:
(:cellnr:) 3/4" Diameter Phillip-like spring
(measured in axial distance from large end of spring)
to:
(:cellnr:) 3/4" Diameter Phillip-like spring (measured in axial distance from large end of spring)
Changed lines 186-187 from:
(:cellnr:) 1/16" I.D. NYC Tap Water Filled
Silicone tube, 48" long
to:
(:cellnr:) 1/16" I.D. NYC Tap Water Filled Silicone tube, 48" long
Changed lines 196-197 from:
(:cellnr:) 3/8" I.D. NYC Tap Water Filled
Silicone tube with 3", 22 Awg. Copper wire lead in water, 48" long
to:
(:cellnr:) 3/8" I.D. NYC Tap Water Filled Silicone tube with 3", 22 Awg. Copper wire lead in water, 48" long
Changed lines 200-201 from:
(:cell:) linear taper field surrounding electrode from
1.5" around tubing at end of copper lead to 0", 5" from lead
to:
(:cell:) linear taper field surrounding electrode from 1.5" around tubing at end of copper lead to 0", 5" from lead
Changed lines 210-211 from:
(:cell:) no sensitivity to one finger, 3" (four fingers)
contact triggers to to 7.5"
to:
(:cell:) no sensitivity to one finger, 3" (four fingers) contact triggers to to 7.5"
Changed lines 212-219 from:
(:cell:) 0ne finger to 13", 3" (four fingers)
contact triggers to to 22"
(:cell:) 0ne finger to 17.5", 3" (four fingers)
contact triggers to to 26"
(:cell:) 0ne finger to 13", 3" (four fingers)
contact triggers to to 38"
to:
(:cell:) 0ne finger to 13", 3" (four fingers) contact triggers to to 22"
(:cell:) 0ne finger to 17.5", 3" (four fingers) contact triggers to to 26"
(:cell:) 0ne finger to 13", 3" (four fingers) contact triggers to to 38"
Changed lines 220-223 from:
(:cell:) sensitivity to greater than 6" contact area to
48"
(:cell:) sensitivity to greater than 2" contact area to
48"
to:
(:cell:) sensitivity to greater than 6" contact area to 48"
(:cell:) sensitivity to greater than 2" contact area to 48"
Changed lines 225-228 from:
(:cell:) sensitiveto three fingers' presence 1/4" from
surface of tube to 48"
to:
(:cell:) sensitiveto three fingers' presence 1/4" from surface of tube to 48"
Changed lines 233-244 from:
(:cell:) 3" firm contact sensitive to 8", greater
than 7" contact sensitive to 15"
(:cell:) 3" firm contact sensitive to 11", greater
than 7" contact sensitive to 18"
(:cell:) three fingers' light contact to 15.5"",
greater than 7" contact sensitive to 26"
(:cell:) one finger light contact to 25", three fingers'
light contact to 48"


(:cellnr:) Sea Salt Water (KCl) Filled 3/8"
Silicon Tube, 48" long
to:
(:cell:) 3" firm contact sensitive to 8", greater than 7" contact sensitive to 15"
(:cell:) 3" firm contact sensitive to 11", greater than 7" contact sensitive to 18"
(:cell:) three fingers' light contact to 15.5"", greater than 7" contact sensitive to 26"
(:cell:) one finger light contact to 25", three fingers' light contact to 48"


(:cellnr:) Sea Salt Water (KCl) Filled 3/8" Silicon Tube, 48" long
Changed lines 241-244 from:
(:cell:) sensitivity to greater than 6" contact area to
48"
(:cell:) sensitivity to greater than 2" contact area to
48"
to:
(:cell:) sensitivity to greater than 6" contact area to 48"
(:cell:) sensitivity to greater than 2" contact area to 48"
Changed lines 245-246 from:
(:cell:) sensitivity to light contact to 48", senses
full hand from 1/2" distance
to:
(:cell:) sensitivity to light contact to 48", senses full hand from 1/2" distance
Changed lines 249-250 from:
(:cellnr:) Bowl of Water 1" x 4" x 7"
with immersed 2" x 2" screen electrode
to:
(:cellnr:) Bowl of Water 1" x 4" x 7" with immersed 2" x 2" screen electrode
Changed lines 255-262 from:
(:cell:) senses full hand from 1/8" above water's
surface
(:cell:) senses full hand from 1-1/4" above water's
surface


(:cellnr:) Bowl of Water 3" x 13" x
10.5" with immersed 2" x 2" screen electrode
to:
(:cell:) senses full hand from 1/8" above water's surface
(:cell:) senses full hand from 1-1/4" above water's surface


(:cellnr:) Bowl of Water 3" x 13" x 10.5" with immersed 2" x 2" screen electrode
Changed lines 266-271 from:
(:cell:) senses full hand from 5 " above water's
surface


(:cellnr:) 2"x2" Copper Wire Screen, 6
wires to the inch
to:
(:cell:) senses full hand from 5 " above water's surface


(:cellnr:) 2"x2" Copper Wire Screen, 6 wires to the inch
Changed lines 279-280 from:
(:cellnr:) 2"x2" Copper Wire Screen, 80
wires to the inch
to:
(:cellnr:) 2"x2" Copper Wire Screen, 80 wires to the inch
Changed lines 82-83 from:
(:table border=0 cellpadding=0 cellspacing=0:)
to:
(:table border=1 width=100% cellpadding=0 cellspacing=0:)
Changed lines 85-93 from:
(:td:) 4.86nF
(:td:) 22.6nF
(:td:) 49nF
(:td:) 100nF
(:td:) 150000pF
(:td:) 221nF
(:td:) 1µF
to:
(:cell:) 4.86nF
(:cell:) 22.6nF
(:cell:) 49nF
(:cell:) 100nF
(:cell:) 150000pF
(:cell:) 221nF
(:cell:) 1µF
Changed lines 95-103 from:
(:td:) .0047K
(:td:) 223K
(:td:) 473J
(:td:) 104M
(:td:) 154M
(:td:) 224K
(:td:) 1.0K
to:
(:cell:) .0047K
(:cell:) 223K
(:cell:) 473J
(:cell:) 104M
(:cell:) 154M
(:cell:) 224K
(:cell:) 1.0K
Changed lines 105-113 from:
(:td:)  
(:td:)  
(:td:)  
(:td:)  
(:td:)  
(:td:)  
(:td:)  
to:
(:cell:)  
(:cell:)  
(:cell:)  
(:cell:)  
(:cell:)  
(:cell:)  
(:cell:)  
Changed lines 115-123 from:
(:td:) firm contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
to:
(:cell:) firm contact
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
Changed lines 125-133 from:
(:td:) no sensitivity
(:td:) contact along 8" of electrode
(:td:) contact along 1.5" of electrode (2 fingers)
(:td:) firm contact
(:td:) light contact
(:td:) light contact
(:td:) 1/4" away, length of electrode: unstable.
to:
(:cell:) no sensitivity
(:cell:) contact along 8" of electrode
(:cell:) contact along 1.5" of electrode (2 fingers)
(:cell:) firm contact
(:cell:) light contact
(:cell:) light contact
(:cell:) 1/4" away, length of electrode: unstable.
Changed lines 135-143 from:
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) 1/4" away, length of electrode: unstable.
to:
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) 1/4" away, length of electrode: unstable.
Changed lines 145-153 from:
(:td:) firm contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
to:
(:cell:) firm contact
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
Changed lines 156-164 from:
(:td:) no sensitivity
(:td:) light contact over 3" (four fingers)
(:td:) light contact over 1.5" (two fingers)
(:td:) light contact
(:td:) light contact
(:td:) one finger triggers within 1/8 of an inch
(:td:) one finger triggers stabily within 1/4"
to:
(:cell:) no sensitivity
(:cell:) light contact over 3" (four fingers)
(:cell:) light contact over 1.5" (two fingers)
(:cell:) light contact
(:cell:) light contact
(:cell:) one finger triggers within 1/8 of an inch
(:cell:) one finger triggers stabily within 1/4"
Changed lines 167-175 from:
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) one finger triggers within 1/8 of an inch
(:td:) one finger triggers within 1/4 of an inch
to:
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) one finger triggers within 1/8 of an inch
(:cell:) one finger triggers within 1/4 of an inch
Changed lines 178-186 from:
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) one finger parallel to spring end
(:td:) one finger 1/4" from spring end
to:
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) one finger parallel to spring end
(:cell:) one finger 1/4" from spring end
Changed lines 189-197 from:
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
to:
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
Changed lines 200-203 from:
(:td:) 1-1/4" from lead
(:td:) 4" from lead
(:td:) 4-3/4" from lead
(:td:) linear taper field surrounding electrode from
to:
(:cell:) 1-1/4" from lead
(:cell:) 4" from lead
(:cell:) 4-3/4" from lead
(:cell:) linear taper field surrounding electrode from
Changed lines 205-209 from:
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
to:
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
Changed lines 212-214 from:
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity to one finger, 3" (four fingers)
to:
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity to one finger, 3" (four fingers)
Changed lines 216-217 from:
(:td:) one finger to 8", four fingers to 19"
(:td:) 0ne finger to 13", 3" (four fingers)
to:
(:cell:) one finger to 8", four fingers to 19"
(:cell:) 0ne finger to 13", 3" (four fingers)
Changed line 219 from:
(:td:) 0ne finger to 17.5", 3" (four fingers)
to:
(:cell:) 0ne finger to 17.5", 3" (four fingers)
Changed line 221 from:
(:td:) 0ne finger to 13", 3" (four fingers)
to:
(:cell:) 0ne finger to 13", 3" (four fingers)
Changed lines 227-228 from:
(:td:) no sensitivity
(:td:) sensitivity to greater than 6" contact area to
to:
(:cell:) no sensitivity
(:cell:) sensitivity to greater than 6" contact area to
Changed line 230 from:
(:td:) sensitivity to greater than 2" contact area to
to:
(:cell:) sensitivity to greater than 2" contact area to
Changed lines 232-235 from:
(:td:) sensitivity to one finger's contact to 48"
(:td:) sensitivity to light contact to 48"
(:td:) sensitivity to light contact to 48"
(:td:) sensitiveto three fingers' presence 1/4" from
to:
(:cell:) sensitivity to one finger's contact to 48"
(:cell:) sensitivity to light contact to 48"
(:cell:) sensitivity to light contact to 48"
(:cell:) sensitiveto three fingers' presence 1/4" from
Changed lines 241-244 from:
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) 3" firm contact sensitive to 8", greater
to:
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) 3" firm contact sensitive to 8", greater
Changed line 246 from:
(:td:) 3" firm contact sensitive to 11", greater
to:
(:cell:) 3" firm contact sensitive to 11", greater
Changed line 248 from:
(:td:) three fingers' light contact to 15.5"",
to:
(:cell:) three fingers' light contact to 15.5"",
Changed line 250 from:
(:td:) one finger light contact to 25", three fingers'
to:
(:cell:) one finger light contact to 25", three fingers'
Changed lines 256-257 from:
(:td:) no sensitivity
(:td:) sensitivity to greater than 6" contact area to
to:
(:cell:) no sensitivity
(:cell:) sensitivity to greater than 6" contact area to
Changed line 259 from:
(:td:) sensitivity to greater than 2" contact area to
to:
(:cell:) sensitivity to greater than 2" contact area to
Changed lines 261-263 from:
(:td:) sensitivity to one finger's contact to 48"
(:td:) sensitivity to light contact to 48"
(:td:) sensitivity to light contact to 48", senses
to:
(:cell:) sensitivity to one finger's contact to 48"
(:cell:) sensitivity to light contact to 48"
(:cell:) sensitivity to light contact to 48", senses
Changed lines 265-267 from:
(:td:) no sensitivity
to:
(:cell:) no sensitivity
Changed lines 270-275 from:
(:td:) no sensitivity
(:td:) one finger's contact sensed
(:td:) one finger's contact sensed
(:td:) one finger's contact sensed
(:td:) one finger's contact sensed
(:td:) senses full hand from 1/8" above water's
to:
(:cell:) no sensitivity
(:cell:) one finger's contact sensed
(:cell:) one finger's contact sensed
(:cell:) one finger's contact sensed
(:cell:) one finger's contact sensed
(:cell:) senses full hand from 1/8" above water's
Changed line 277 from:
(:td:) senses full hand from 1-1/4" above water's
to:
(:cell:) senses full hand from 1-1/4" above water's
Changed lines 283-289 from:
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) one finger's contact sensed
(:td:) one finger's contact sensed
(:td:) one finger's contact sensed
(:td:) senses full hand from 1" above water's surface
(:td:) senses full hand from 5 " above water's
to:
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) one finger's contact sensed
(:cell:) one finger's contact sensed
(:cell:) one finger's contact sensed
(:cell:) senses full hand from 1" above water's surface
(:cell:) senses full hand from 5 " above water's
Changed lines 295-303 from:
(:td:) firm contact
(:td:) light contact
(:td:) light contact
(:td:) senses finger from 1/16" distance
(:td:) senses finger from 1/8" distance
(:td:) senses finger from 1/2" distance
(:td:) senses finger from 1" distance
to:
(:cell:) firm contact
(:cell:) light contact
(:cell:) light contact
(:cell:) senses finger from 1/16" distance
(:cell:) senses finger from 1/8" distance
(:cell:) senses finger from 1/2" distance
(:cell:) senses finger from 1" distance
Changed lines 306-314 from:
(:td:) firm contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) senses finger from 1/4" distance
(:td:) senses finger from 1/2" distance
(:td:) senses finger from 1-1/8" distance
to:
(:cell:) firm contact
(:cell:) light contact
(:cell:) light contact
(:cell:) light contact
(:cell:) senses finger from 1/4" distance
(:cell:) senses finger from 1/2" distance
(:cell:) senses finger from 1-1/8" distance
Changed lines 316-324 from:
(:td:) firm contact
(:td:) light contact
(:td:) light contact
(:td:) senses finger from 3/8" distance
(:td:) senses finger from 5/8" distance
(:td:) senses finger from 1-1/4" distance
(:td:) senses finger from 2-1/2" distance
to:
(:cell:) firm contact
(:cell:) light contact
(:cell:) light contact
(:cell:) senses finger from 3/8" distance
(:cell:) senses finger from 5/8" distance
(:cell:) senses finger from 1-1/4" distance
(:cell:) senses finger from 2-1/2" distance
Changed lines 326-334 from:
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
to:
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
Changed lines 336-344 from:
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
to:
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
Changed lines 346-352 from:
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
to:
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
(:cell:) no sensitivity
Changed lines 82-83 from:
(:table (border=0 cellpadding=0 cellspacing=0):)
to:
(:table border=0 cellpadding=0 cellspacing=0:)
Changed lines 82-83 from:
(:table (border=0) (cellpadding=0) (cellspacing=0):)
to:
(:table (border=0 cellpadding=0 cellspacing=0):)
Changed lines 82-154 from:
(:table (border=0) (cellpadding=0) (cellspacing=0) :)

(:cellnr :)Capacitor
(Cs) Value
(:td:)4.86nF
(:td:)22.6nF
(:td:)49nF
(:td:)100nF
(:td:)150000pF
(:td:)221nF
(:td:)1µF


(:cellnr :)Capacitor Code
(:td:).0047K
(:td:)223K
(:td:)473J
(:td:)104M
(:td:)154M
(:td:)224K
(:td:)1.0K


(:cellnr :)material (Cx)
(:td:) 
(:td:) 
(:td:) 
(:td:) 
(:td:) 
(:td:) 
(:td:) 


(:cellnr :)Solid Conductor 22 Awg. Copper 12" long, straight, uninsulated
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact


(:cellnr :)Stranded Conductor 22 Awg copper 12" long, straight, insulated
(:td:)no sensitivity
(:td:)contact along 8" of electrode
(:td:)contact along 1.5" of electrode (2 fingers)
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)1/4" away, length of electrode: unstable.


(:cellnr :)Stranded Conductor 22 Awg copper 12" long, straight, uninsulated
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(
:td:)light contact
(:td:)light contact
(:td:)1/4" away, length of electrode: unstable.


(:cellnr :)Solid Conductor 14 Awg. Copper 12" long, straight, uninsulated
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact


(:cellnr
:)Stranded Conductor 16 Awg copper
to:
(:table (border=0) (cellpadding=0) (cellspacing=0):)

(:cellnr:) Capacitor (Cs) Value
(:td:) 4.86nF
(:td:) 22.6nF
(:td:) 49nF
(:td:) 100nF
(:td:) 150000pF
(:td:) 221nF
(:td:) 1µF


(:cellnr:) Capacitor Code
(:td:) .0047K
(:td:) 223K
(:td:) 473J
(:td:) 104M
(:td:) 154M
(:td:) 224K
(:td:) 1.0K


(:cellnr:) material (Cx)
(:td:)  
(:td:)  
(:td:)  
(:td:)  
(:td:)  
(:td:)  
(:td:)  


(:cellnr:) Solid Conductor 22 Awg. Copper 12" long, straight, uninsulated
(:td:) firm contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact


(:cellnr:) Stranded Conductor 22 Awg copper 12" long, straight, insulated
(:td:) no sensitivity
(:td:) contact along 8" of electrode
(:td:) contact along 1.5" of electrode (2 fingers)
(:td:) firm contact
(:td:) light contact
(:td:) light contact
(:td:) 1/4" away, length of electrode: unstable.


(:cellnr:) Stranded Conductor 22 Awg copper 12" long, straight, uninsulated
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) 1/4" away, length of electrode: unstable.


(:cellnr:
) Solid Conductor 14 Awg. Copper 12" long, straight, uninsulated
(:td:) firm contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact


(:cellnr:)
Stranded Conductor 16 Awg copper
Changed lines 156-165 from:
(:td:)no sensitivity
(:td:)light contact over 3" (four fingers)
(:td:)light contact over 1.5" (two fingers)
(:td:)light contact
(:td:)light contact
(:td:)one finger triggers within 1/8 of an inch
(:td:)one finger triggers stabily within 1/4"


(:cellnr :)Stranded Conductor 16 Awg copper
to:
(:td:) no sensitivity
(:td:) light contact over 3" (four fingers)
(:td:) light contact over 1.5" (two fingers)
(:td:) light contact
(:td:) light contact
(:td:) one finger triggers within 1/8 of an inch
(:td:) one finger triggers stabily within 1/4"


(:cellnr:) Stranded Conductor 16 Awg copper
Changed lines 167-176 from:
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)one finger triggers within 1/8 of an inch
(:td:)one finger triggers within 1/4 of an inch


(:cellnr :)3/4" Diameter Phillip-like spring
to:
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) one finger triggers within 1/8 of an inch
(:td:) one finger triggers within 1/4 of an inch


(:cellnr:) 3/4" Diameter Phillip-like spring
Changed lines 178-187 from:
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)one finger parallel to spring end
(:td:)one finger 1/4" from spring end


(:cellnr :)1/16" I.D. NYC Tap Water Filled
to:
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) one finger parallel to spring end
(:td:) one finger 1/4" from spring end


(:cellnr:) 1/16" I.D. NYC Tap Water Filled
Changed lines 189-198 from:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity


(:cellnr :)3/8" I.D. NYC Tap Water Filled
to:
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity


(:cellnr:) 3/8" I.D. NYC Tap Water Filled
Changed lines 200-203 from:
(:td:)1-1/4" from lead
(:td:)4" from lead
(:td:)4-3/4" from lead
(:td:) linear taper field surrounding electrode from
to:
(:td:) 1-1/4" from lead
(:td:) 4" from lead
(:td:) 4-3/4" from lead
(:td:) linear taper field surrounding electrode from
Changed lines 205-210 from:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity


(:cellnr :)Salt Water (NaCl) Filled 1/16"
to:
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity


(:cellnr:) Salt Water (NaCl) Filled 1/16"
Changed lines 212-214 from:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity to one finger, 3" (four fingers)
to:
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity to one finger, 3" (four fingers)
Changed lines 216-217 from:
(:td:)one finger to 8", four fingers to 19"
(:td:)0ne finger to 13", 3" (four fingers)
to:
(:td:) one finger to 8", four fingers to 19"
(:td:) 0ne finger to 13", 3" (four fingers)
Changed line 219 from:
(:td:)0ne finger to 17.5", 3" (four fingers)
to:
(:td:) 0ne finger to 17.5", 3" (four fingers)
Changed line 221 from:
(:td:)0ne finger to 13", 3" (four fingers)
to:
(:td:) 0ne finger to 13", 3" (four fingers)
Changed line 225 from:
(:cellnr :)Salt Water (NaCl) Filled 3/8" Silicon
to:
(:cellnr:) Salt Water (NaCl) Filled 3/8" Silicon
Changed lines 227-228 from:
(:td:)no sensitivity
(:td:)sensitivity to greater than 6" contact area to
to:
(:td:) no sensitivity
(:td:) sensitivity to greater than 6" contact area to
Changed line 230 from:
(:td:)sensitivity to greater than 2" contact area to
to:
(:td:) sensitivity to greater than 2" contact area to
Changed lines 232-235 from:
(:td:)sensitivity to one finger's contact to 48"
(:td:)sensitivity to light contact to 48"
(:td:)sensitivity to light contact to 48"
(:td:)sensitiveto three fingers' presence 1/4" from
to:
(:td:) sensitivity to one finger's contact to 48"
(:td:) sensitivity to light contact to 48"
(:td:) sensitivity to light contact to 48"
(:td:) sensitiveto three fingers' presence 1/4" from
Changed line 239 from:
(:cellnr :)Sea Salt Water (KCl) Filled 1/16"
to:
(:cellnr:) Sea Salt Water (KCl) Filled 1/16"
Changed lines 241-244 from:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)3" firm contact sensitive to 8", greater
to:
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) 3" firm contact sensitive to 8", greater
Changed line 246 from:
(:td:)3" firm contact sensitive to 11", greater
to:
(:td:) 3" firm contact sensitive to 11", greater
Changed line 248 from:
(:td:)three fingers' light contact to 15.5"",
to:
(:td:) three fingers' light contact to 15.5"",
Changed line 250 from:
(:td:)one finger light contact to 25", three fingers'
to:
(:td:) one finger light contact to 25", three fingers'
Changed line 254 from:
(:cellnr :)Sea Salt Water (KCl) Filled 3/8"
to:
(:cellnr:) Sea Salt Water (KCl) Filled 3/8"
Changed lines 256-257 from:
(:td:)no sensitivity
(:td:)sensitivity to greater than 6" contact area to
to:
(:td:) no sensitivity
(:td:) sensitivity to greater than 6" contact area to
Changed line 259 from:
(:td:)sensitivity to greater than 2" contact area to
to:
(:td:) sensitivity to greater than 2" contact area to
Changed lines 261-263 from:
(:td:)sensitivity to one finger's contact to 48"
(:td:)sensitivity to light contact to 48"
(:td:)sensitivity to light contact to 48", senses
to:
(:td:) sensitivity to one finger's contact to 48"
(:td:) sensitivity to light contact to 48"
(:td:) sensitivity to light contact to 48", senses
Changed lines 265-268 from:
(:td:)no sensitivity


(:cellnr :)Bowl of Water 1" x 4" x 7"
to:
(:td:) no sensitivity


(:cellnr:) Bowl of Water 1" x 4" x 7"
Changed lines 270-275 from:
(:td:)no sensitivity
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:) senses full hand from 1/8" above water's
to:
(:td:) no sensitivity
(:td:) one finger's contact sensed
(:td:) one finger's contact sensed
(:td:) one finger's contact sensed
(:td:) one finger's contact sensed
(:td:) senses full hand from 1/8" above water's
Changed line 277 from:
(:td:) senses full hand from 1-1/4" above water's
to:
(:td:) senses full hand from 1-1/4" above water's
Changed line 281 from:
(:cellnr :)Bowl of Water 3" x 13" x
to:
(:cellnr:) Bowl of Water 3" x 13" x
Changed lines 283-289 from:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:) senses full hand from 1" above water's surface
(:td:) senses full hand from 5 " above water's
to:
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) one finger's contact sensed
(:td:) one finger's contact sensed
(:td:) one finger's contact sensed
(:td:) senses full hand from 1" above water's surface
(:td:) senses full hand from 5 " above water's
Changed line 293 from:
(:cellnr :)2"x2" Copper Wire Screen, 6
to:
(:cellnr:) 2"x2" Copper Wire Screen, 6
Changed lines 295-304 from:
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)senses finger from 1/16" distance
(:td:)senses finger from 1/8" distance
(:td:)senses finger from 1/2" distance
(:td:)senses finger from 1" distance


(:cellnr :)2"x2" Copper Wire Screen, 80
to:
(:td:) firm contact
(:td:) light contact
(:td:) light contact
(:td:) senses finger from 1/16" distance
(:td:) senses finger from 1/8" distance
(:td:) senses finger from 1/2" distance
(:td:) senses finger from 1" distance


(:cellnr:) 2"x2" Copper Wire Screen, 80
Changed lines 306-355 from:
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)senses finger from 1/4" distance
(:td:)senses finger from 1/2" distance
(:td:)senses finger from 1-1/8" distance


(:cellnr :)5"x5" Copper Wire Screen
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)senses finger from 3/8" distance
(:td:)senses finger from 5/8" distance
(:td:)senses finger from 1-1/4" distance
(:td:)senses finger from 2-1/2" distance


(:cellnr :)Anvil
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity


(:cellnr :)Fluorescent tube, loose (48"Phillips F32T8)
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity


(:cellnr :)Fluorescent tube, In Fixture (48"Phillips F32T8)
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:tableend:)
to:
(:td:) firm contact
(:td:) light contact
(:td:) light contact
(:td:) light contact
(:td:) senses finger from 1/4" distance
(:td:) senses finger from 1/2" distance
(:td:) senses finger from 1-1/8" distance


(:cellnr:) 5"x5" Copper Wire Screen
(:td:) firm contact
(:td:) light contact
(:td:) light contact
(:td:) senses finger from 3/8" distance
(:td:) senses finger from 5/8" distance
(:td:) senses finger from 1-1/4" distance
(:td:) senses finger from 2-1/2" distance


(:cellnr:) Anvil
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity


(:cellnr:) Fluorescent tube, loose (48"Phillips F32T8)
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity


(:cellnr:) Fluorescent tube, In Fixture (48"Phillips F32T8)
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:td:) no sensitivity
(:tableend:)
Changed line 84 from:
(: cellnr :)Capacitor (Cs) Value
to:
(:cellnr :)Capacitor (Cs) Value
Changed line 94 from:
(: cellnr :)Capacitor Code
to:
(:cellnr :)Capacitor Code
Changed line 104 from:
(: cellnr :)material (Cx)
to:
(:cellnr :)material (Cx)
Changed line 114 from:
(: cellnr :)Solid Conductor 22 Awg. Copper 12" long, straight, uninsulated
to:
(:cellnr :)Solid Conductor 22 Awg. Copper 12" long, straight, uninsulated
Changed line 124 from:
(: cellnr :)Stranded Conductor 22 Awg copper 12" long, straight, insulated
to:
(:cellnr :)Stranded Conductor 22 Awg copper 12" long, straight, insulated
Changed line 134 from:
(: cellnr :)Stranded Conductor 22 Awg copper 12" long, straight, uninsulated
to:
(:cellnr :)Stranded Conductor 22 Awg copper 12" long, straight, uninsulated
Changed line 144 from:
(: cellnr :)Solid Conductor 14 Awg. Copper 12" long, straight, uninsulated
to:
(:cellnr :)Solid Conductor 14 Awg. Copper 12" long, straight, uninsulated
Changed line 154 from:
(: cellnr :)Stranded Conductor 16 Awg copper
to:
(:cellnr :)Stranded Conductor 16 Awg copper
Changed line 165 from:
(: cellnr :)Stranded Conductor 16 Awg copper
to:
(:cellnr :)Stranded Conductor 16 Awg copper
Changed line 176 from:
(: cellnr :)3/4" Diameter Phillip-like spring
to:
(:cellnr :)3/4" Diameter Phillip-like spring
Changed line 187 from:
(: cellnr :)1/16" I.D. NYC Tap Water Filled
to:
(:cellnr :)1/16" I.D. NYC Tap Water Filled
Changed line 198 from:
(: cellnr :)3/8" I.D. NYC Tap Water Filled
to:
(:cellnr :)3/8" I.D. NYC Tap Water Filled
Changed line 210 from:
(: cellnr :)Salt Water (NaCl) Filled 1/16"
to:
(:cellnr :)Salt Water (NaCl) Filled 1/16"
Changed line 225 from:
(: cellnr :)Salt Water (NaCl) Filled 3/8" Silicon
to:
(:cellnr :)Salt Water (NaCl) Filled 3/8" Silicon
Changed line 239 from:
(: cellnr :)Sea Salt Water (KCl) Filled 1/16"
to:
(:cellnr :)Sea Salt Water (KCl) Filled 1/16"
Changed line 254 from:
(: cellnr :)Sea Salt Water (KCl) Filled 3/8"
to:
(:cellnr :)Sea Salt Water (KCl) Filled 3/8"
Changed line 268 from:
(: cellnr :)Bowl of Water 1" x 4" x 7"
to:
(:cellnr :)Bowl of Water 1" x 4" x 7"
Changed line 281 from:
(: cellnr :)Bowl of Water 3" x 13" x
to:
(:cellnr :)Bowl of Water 3" x 13" x
Changed line 293 from:
(: cellnr :)2"x2" Copper Wire Screen, 6
to:
(:cellnr :)2"x2" Copper Wire Screen, 6
Changed line 304 from:
(: cellnr :)2"x2" Copper Wire Screen, 80
to:
(:cellnr :)2"x2" Copper Wire Screen, 80
Changed line 315 from:
(: cellnr :)5"x5" Copper Wire Screen
to:
(:cellnr :)5"x5" Copper Wire Screen
Changed line 325 from:
(: cellnr :)Anvil
to:
(:cellnr :)Anvil
Changed line 335 from:
(: cellnr :)Fluorescent tube, loose (48"Phillips F32T8)
to:
(:cellnr :)Fluorescent tube, loose (48"Phillips F32T8)
Changed line 345 from:
(: cellnr :)Fluorescent tube, In Fixture (48"Phillips F32T8)
to:
(:cellnr :)Fluorescent tube, In Fixture (48"Phillips F32T8)
Deleted lines 373-375:

Changed lines 82-83 from:
(:table border=0 cellpadding=0 cellspacing=0:)
to:
(:table (border=0) (cellpadding=0) (cellspacing=0) :)
Changed lines 84-93 from:
(: cellnr :)Capacitor (Cs) Value
(:td:)4.86nF
(:td:)22.6nF
(:td:)49nF
(:td:)100nF
(:td:)150000pF
(:td:)221nF
(:td:)1µF
to:
(: cellnr :)Capacitor (Cs) Value
(:td:)4.86nF
(:td:)22.6nF
(:td:)49nF
(:td:)100nF
(:td:)150000pF
(:td:)221nF
(:td:)1µF
Changed lines 95-103 from:
(:td:).0047K
(:td:)223K
(:td:)473J
(:td:)104M
(:td:)154M
(:td:)224K
(:td:)1.0K
to:
(:td:).0047K
(:td:)223K
(:td:)473J
(:td:)104M
(:td:)154M
(:td:)224K
(:td:)1.0K
Changed lines 105-114 from:
(:td:) 
(:td:) 
(:td:) 
(:td:) 
(:td:) 
(:td:) 
(:td:) 


(: cellnr :)Solid Conductor 22 Awg. Copper
to:
(:td:) 
(:td:) 
(:td:) 
(:td:) 
(:td:) 
(:td:) 
(:td:) 


(: cellnr :)Solid Conductor 22 Awg. Copper 12" long, straight, uninsulated
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact


(: cellnr :)Stranded Conductor 22 Awg copper 12" long, straight, insulated
(:td:)no sensitivity
(:td:)contact along 8" of electrode
(:td:)contact along 1.5" of electrode (2 fingers)
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)1/4" away, length of electrode: unstable.


(: cellnr :)Stranded Conductor 22 Awg copper 12" long, straight, uninsulated
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)1/4" away, length of electrode: unstable.


(: cellnr :)Solid Conductor 14 Awg. Copper 12" long, straight, uninsulated
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact


(: cellnr :)Stranded Conductor 16 Awg copper
12" long, straight, insulated
(:td:)no sensitivity
(:td:)light contact over 3" (four fingers)
(:td:)light contact over 1.5" (two fingers)
(:td:)light contact
(:td:)light contact
(:td:)one finger triggers within 1/8 of an inch
(:td:)one finger triggers stabily within 1/4"


(: cellnr :)Stranded Conductor 16 Awg copper
Changed lines 167-230 from:
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact


(: cellnr :)Stranded Conductor 22 Awg copper
12" long, straight, insulated
(:td:)no sensitivity
(:td:)contact along 8" of electrode
(:td:)contact along 1.5" of electrode (2 fingers)
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)1/4" away, length of electrode: unstable.


(: cellnr :)Stranded Conductor 22 Awg copper
12" long, straight, uninsulated
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)1/4" away, length of electrode: unstable.


(: cellnr :)Solid Conductor 14 Awg. Copper
12" long, straight, uninsulated
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact


(: cellnr :)Stranded Conductor 16 Awg copper
12" long, straight, insulated
(:td:)no sensitivity
(:td:)light contact over 3" (four fingers)
(:td:)light contact over 1.5" (two fingers)
(:td:)light contact
(:td:)light contact
(:td:)one finger triggers within 1/8 of an inch
(:td:)one finger triggers stabily within 1/4"


(: cellnr :)Stranded Conductor 16 Awg copper
12" long, straight, uninsulated
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)one finger triggers within 1/8 of an inch
(:td:)one finger triggers within 1/4 of an inch
to:
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)one finger triggers within 1/8 of an inch
(:td:)one finger triggers within 1/4 of an inch
Changed lines 178-186 from:
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)one finger parallel to spring end
(:td:)one finger 1/4" from spring end
to:
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)one finger parallel to spring end
(:td:)one finger 1/4" from spring end
Changed lines 189-197 from:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
to:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
Changed lines 200-203 from:
(:td:)1-1/4" from lead
(:td:)4" from lead
(:td:)4-3/4" from lead
(:td:) linear taper field surrounding electrode from
to:
(:td:)1-1/4" from lead
(:td:)4" from lead
(:td:)4-3/4" from lead
(:td:) linear taper field surrounding electrode from
Changed lines 205-209 from:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
to:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
Changed lines 212-214 from:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity to one finger, 3" (four fingers)
to:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity to one finger, 3" (four fingers)
Changed lines 216-217 from:
(:td:)one finger to 8", four fingers to 19"
(:td:)0ne finger to 13", 3" (four fingers)
to:
(:td:)one finger to 8", four fingers to 19"
(:td:)0ne finger to 13", 3" (four fingers)
Changed line 219 from:
(:td:)0ne finger to 17.5", 3" (four fingers)
to:
(:td:)0ne finger to 17.5", 3" (four fingers)
Changed line 221 from:
(:td:)0ne finger to 13", 3" (four fingers)
to:
(:td:)0ne finger to 13", 3" (four fingers)
Changed lines 227-228 from:
(:td:)no sensitivity
(:td:)sensitivity to greater than 6" contact area to
to:
(:td:)no sensitivity
(:td:)sensitivity to greater than 6" contact area to
Changed line 230 from:
(:td:)sensitivity to greater than 2" contact area to
to:
(:td:)sensitivity to greater than 2" contact area to
Changed lines 232-235 from:
(:td:)sensitivity to one finger's contact to 48"
(:td:)sensitivity to light contact to 48"
(:td:)sensitivity to light contact to 48"
(:td:)sensitiveto three fingers' presence 1/4" from
to:
(:td:)sensitivity to one finger's contact to 48"
(:td:)sensitivity to light contact to 48"
(:td:)sensitivity to light contact to 48"
(:td:)sensitiveto three fingers' presence 1/4" from
Changed lines 241-244 from:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)3" firm contact sensitive to 8", greater
to:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)3" firm contact sensitive to 8", greater
Changed line 246 from:
(:td:)3" firm contact sensitive to 11", greater
to:
(:td:)3" firm contact sensitive to 11", greater
Changed line 248 from:
(:td:)three fingers' light contact to 15.5"",
to:
(:td:)three fingers' light contact to 15.5"",
Changed line 250 from:
(:td:)one finger light contact to 25", three fingers'
to:
(:td:)one finger light contact to 25", three fingers'
Changed lines 256-257 from:
(:td:)no sensitivity
(:td:)sensitivity to greater than 6" contact area to
to:
(:td:)no sensitivity
(:td:)sensitivity to greater than 6" contact area to
Changed line 259 from:
(:td:)sensitivity to greater than 2" contact area to
to:
(:td:)sensitivity to greater than 2" contact area to
Changed lines 261-263 from:
(:td:)sensitivity to one finger's contact to 48"
(:td:)sensitivity to light contact to 48"
(:td:)sensitivity to light contact to 48", senses
to:
(:td:)sensitivity to one finger's contact to 48"
(:td:)sensitivity to light contact to 48"
(:td:)sensitivity to light contact to 48", senses
Changed lines 265-267 from:
(:td:)no sensitivity
to:
(:td:)no sensitivity
Changed lines 270-275 from:
(:td:)no sensitivity
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:) senses full hand from 1/8" above water's
to:
(:td:)no sensitivity
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:) senses full hand from 1/8" above water's
Changed line 277 from:
(:td:) senses full hand from 1-1/4" above water's
to:
(:td:) senses full hand from 1-1/4" above water's
Changed lines 283-289 from:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:) senses full hand from 1" above water's surface
(:td:) senses full hand from 5 " above water's
to:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:) senses full hand from 1" above water's surface
(:td:) senses full hand from 5 " above water's
Changed lines 295-303 from:
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)senses finger from 1/16" distance
(:td:)senses finger from 1/8" distance
(:td:)senses finger from 1/2" distance
(:td:)senses finger from 1" distance
to:
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)senses finger from 1/16" distance
(:td:)senses finger from 1/8" distance
(:td:)senses finger from 1/2" distance
(:td:)senses finger from 1" distance
Changed lines 306-314 from:
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)senses finger from 1/4" distance
(:td:)senses finger from 1/2" distance
(:td:)senses finger from 1-1/8" distance
to:
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)senses finger from 1/4" distance
(:td:)senses finger from 1/2" distance
(:td:)senses finger from 1-1/8" distance
Changed lines 316-324 from:
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)senses finger from 3/8" distance
(:td:)senses finger from 5/8" distance
(:td:)senses finger from 1-1/4" distance
(:td:)senses finger from 2-1/2" distance
to:
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)senses finger from 3/8" distance
(:td:)senses finger from 5/8" distance
(:td:)senses finger from 1-1/4" distance
(:td:)senses finger from 2-1/2" distance
Changed lines 326-354 from:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity


(: cellnr :)Fluorescent tube, loose (48"Phillips
F32T8)
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity


(: cellnr :)Fluorescent tube, In Fixture
(48"Phillips F32T8)
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
to:
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity


(: cellnr :)Fluorescent tube, loose (48"Phillips F32T8)
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity


(: cellnr :)Fluorescent tube, In Fixture (48"Phillips F32T8)
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
Added lines 82-361:
(:table border=0 cellpadding=0 cellspacing=0:)

(: cellnr :)Capacitor (Cs) Value
(:td:)4.86nF
(:td:)22.6nF
(:td:)49nF
(:td:)100nF
(:td:)150000pF
(:td:)221nF
(:td:)1µF


(: cellnr :)Capacitor Code
(:td:).0047K
(:td:)223K
(:td:)473J
(:td:)104M
(:td:)154M
(:td:)224K
(:td:)1.0K


(: cellnr :)material (Cx)
(:td:) 
(:td:) 
(:td:) 
(:td:) 
(:td:) 
(:td:) 
(:td:) 


(: cellnr :)Solid Conductor 22 Awg. Copper
12" long, straight, uninsulated
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact


(: cellnr :)Stranded Conductor 22 Awg copper
12" long, straight, insulated
(:td:)no sensitivity
(:td:)contact along 8" of electrode
(:td:)contact along 1.5" of electrode (2 fingers)
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)1/4" away, length of electrode: unstable.


(: cellnr :)Stranded Conductor 22 Awg copper
12" long, straight, uninsulated
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)1/4" away, length of electrode: unstable.


(: cellnr :)Solid Conductor 14 Awg. Copper
12" long, straight, uninsulated
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact


(: cellnr :)Stranded Conductor 16 Awg copper
12" long, straight, insulated
(:td:)no sensitivity
(:td:)light contact over 3" (four fingers)
(:td:)light contact over 1.5" (two fingers)
(:td:)light contact
(:td:)light contact
(:td:)one finger triggers within 1/8 of an inch
(:td:)one finger triggers stabily within 1/4"


(: cellnr :)Stranded Conductor 16 Awg copper
12" long, straight, uninsulated
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)one finger triggers within 1/8 of an inch
(:td:)one finger triggers within 1/4 of an inch


(: cellnr :)3/4" Diameter Phillip-like spring
(measured in axial distance from large end of spring)
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)one finger parallel to spring end
(:td:)one finger 1/4" from spring end


(: cellnr :)1/16" I.D. NYC Tap Water Filled
Silicone tube, 48" long
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity


(: cellnr :)3/8" I.D. NYC Tap Water Filled
Silicone tube with 3", 22 Awg. Copper wire lead in water, 48" long
(:td:)1-1/4" from lead
(:td:)4" from lead
(:td:)4-3/4" from lead
(:td:) linear taper field surrounding electrode from
1.5" around tubing at end of copper lead to 0", 5" from lead
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity


(: cellnr :)Salt Water (NaCl) Filled 1/16"
Silicon Tube, 48" long
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity to one finger, 3" (four fingers)
contact triggers to to 7.5"
(:td:)one finger to 8", four fingers to 19"
(:td:)0ne finger to 13", 3" (four fingers)
contact triggers to to 22"
(:td:)0ne finger to 17.5", 3" (four fingers)
contact triggers to to 26"
(:td:)0ne finger to 13", 3" (four fingers)
contact triggers to to 38"


(: cellnr :)Salt Water (NaCl) Filled 3/8" Silicon
Tube, 48" long
(:td:)no sensitivity
(:td:)sensitivity to greater than 6" contact area to
48"
(:td:)sensitivity to greater than 2" contact area to
48"
(:td:)sensitivity to one finger's contact to 48"
(:td:)sensitivity to light contact to 48"
(:td:)sensitivity to light contact to 48"
(:td:)sensitiveto three fingers' presence 1/4" from
surface of tube to 48"


(: cellnr :)Sea Salt Water (KCl) Filled 1/16"
Silicon Tube, 48" long
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)3" firm contact sensitive to 8", greater
than 7" contact sensitive to 15"
(:td:)3" firm contact sensitive to 11", greater
than 7" contact sensitive to 18"
(:td:)three fingers' light contact to 15.5"",
greater than 7" contact sensitive to 26"
(:td:)one finger light contact to 25", three fingers'
light contact to 48"


(: cellnr :)Sea Salt Water (KCl) Filled 3/8"
Silicon Tube, 48" long
(:td:)no sensitivity
(:td:)sensitivity to greater than 6" contact area to
48"
(:td:)sensitivity to greater than 2" contact area to
48"
(:td:)sensitivity to one finger's contact to 48"
(:td:)sensitivity to light contact to 48"
(:td:)sensitivity to light contact to 48", senses
full hand from 1/2" distance
(:td:)no sensitivity


(: cellnr :)Bowl of Water 1" x 4" x 7"
with immersed 2" x 2" screen electrode
(:td:)no sensitivity
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:) senses full hand from 1/8" above water's
surface
(:td:) senses full hand from 1-1/4" above water's
surface


(: cellnr :)Bowl of Water 3" x 13" x
10.5" with immersed 2" x 2" screen electrode
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:)one finger's contact sensed
(:td:) senses full hand from 1" above water's surface
(:td:) senses full hand from 5 " above water's
surface


(: cellnr :)2"x2" Copper Wire Screen, 6
wires to the inch
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)senses finger from 1/16" distance
(:td:)senses finger from 1/8" distance
(:td:)senses finger from 1/2" distance
(:td:)senses finger from 1" distance


(: cellnr :)2"x2" Copper Wire Screen, 80
wires to the inch
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)light contact
(:td:)senses finger from 1/4" distance
(:td:)senses finger from 1/2" distance
(:td:)senses finger from 1-1/8" distance


(: cellnr :)5"x5" Copper Wire Screen
(:td:)firm contact
(:td:)light contact
(:td:)light contact
(:td:)senses finger from 3/8" distance
(:td:)senses finger from 5/8" distance
(:td:)senses finger from 1-1/4" distance
(:td:)senses finger from 2-1/2" distance


(: cellnr :)Anvil
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity


(: cellnr :)Fluorescent tube, loose (48"Phillips
F32T8)
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity


(: cellnr :)Fluorescent tube, In Fixture
(48"Phillips F32T8)
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:td:)no sensitivity
(:tableend:)
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There is nothing in the literature to tell you this works, but I used both ten and twenty MHz half-can powered occilators to time both the QT140 and a PIC. Wired to the OSCIN pin and left the OSCOUT pin barren. Worked fine.
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!!!A Note on Board Design
----

It should probably be noted that I am a proud guy. Silly as it may be, when I solder a board, I like to use the space as efficiently as I can.
This caused me endless pain on a project because I had placed a row of female headers between the voltage regulator and the PIC on a board mounted in a small cavity in a sculpture. I had about a dozen wires to connect individually to the board. I did not have fun. Please let my folly be your guide; Place your connectors out in the middle of an empty field where little deer graze on unharvested grain. Don't wedge them into a little bit of unused space.
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Other tests performed involved shaping of the electrodes. Flat, dished (concave), looped and a short strip of copper mesh were all soldered to leads and tested in the circuit, as was a plain wire. The plain wire tripped the circuit at each touch. The flat electrode triggered the sensor when a finger was positioned within Ľ” of either side of it. The dished electrode appeared to focus the field to the center of the concave side so that sense was acquired within ˝” if the surface, while the convex side had to be touched to trigger the sensor. The strip was not much more sensitive than the bare wire.

!!!Application Notes
to:
Other tests performed involved shaping of the electrodes. Flat, dished (concave), and looped copper mesh, as well as a narrow strip of the same material, were all soldered to leads and tested in the circuit, as was a plain copper wire. The plain wire tripped the circuit at each touch. The flat electrode triggered the sensor when a finger was positioned within Ľ” of either side of it. The dished electrode appeared to focus the field to the center of the concave side so that sense was acquired within ˝” of the surface, while the convex side had to be touched to trigger the sensor. The strip was not much more sensitive than the bare wire.


!!!Testing
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!!!Testing
----
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!!!Application Notes
----

Use of the QT140 is pretty straight forward. I did find the datasheet's advice reguarding the use of grounded and shielded sensor lead cables was helpful. Shielding the lead completely eliminated reads off the cables themselves. The capacitors on the board, however, act like perfect little sensors, themselves, so plan to have them either away from activity or shield the whole board.

I inadvertently tested the QT140's need for its own, discreet power regulator. A Pic on the same circuit tripped up the QProx when it lit up a number of LEDs at the same time. Discreet circuits is definately the way to go.




Added lines 64-84:
First off let me say that this is not intended as, and should not be assumed to be, a scientific analysis of the sensor tested. It was as systematic as I could manage, but as the conditions under which I did the testing were less than ideal, I make no claim that a similar test would produce the same results. My intention is to provide an idea of the range of capability of the QT140 and similar sensors.

!!!Method
----
The majority of testing was performed on November 20, 2005 in Queens, New York. A soldered bread board was created for the purposes of making the testing conditions as uniform as possible. All of the electrodes tested (with the exception of the first electrode created, the 3/8” NYC tap water electrode) were constructed using a coaxial cable lead with the shielding grounded against electromagnetic interference and soldered pins to fit the test circuit as pictured in the first image.

A wide range of capacitors were looked at for testing, but ultimately the list was narrowed to seven for comparison. The parameters for this choice were having a value that falls within or above the stated Cs range of the sensor (1nF-100nF), that they were of a sufficiently different value from others being tested, and seemed likely to prove of interest to us. Most of the capacitors were of the “monolithic” variety, though I also tested some of the Mylar variety. All were non-polarized. Each of the capacitors selected was first tested on a Radio Shack digital “true RMS” multimeter to get a somewhat accurate reading of its capacitance.

The method for testing was simple methodical repetition of the same steps over and over and over…. I tested each electrode in the sample with each of the capacitor values, recording the data at each step. The conditions in the testing area were relatively consistent, though it should be noted that this testing was performed in the cold of November, which means that the air was dry, having an affect on capacitance. Results may be different under more humid conditions.

The electrodes tested ranged from the obvious copper wire and copper screen to the greatest extremes I could come up in short order. This included a 175 lb. anvil and 4’ fluorescent tubes. I knew it was a long shot, but I had to try it, at least. I have to admit that my testing method for the anvil was pretty shoddy (though I stand by the rest as reasonably good), so if you had your heart set upon using that anvil you have laying around as a sensor, fret not. I may have just fubbed the test. Let me know if you have success.

The measurements indicated on the chart were taken with a plastic graphic design ruler that did not seem to affect the results. They represent an approximately radial distance from the electrode surface to the tip of the finger. Each measurement was tested several times before selecting what I felt was the most representative measurement. That is, I recorded the most frequent result.

So far as the rest of it goes, I think the chart pretty well stands alone.





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!!!Testing
----

[[Attach:QproxTestChart.gif]]
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The '''QT 140''' is a capacitance sensor, distinguishing itself from the rest of the [[http://www.qprox.com | Qprox lineup]] in that it operates four separate sensor channels independently. It’s function is based on its ability to sense an increase in capacitance in its sense circuit. When capacitance on one of its sensor channels grows, the QT140 (which from here on I will refer to simply as “Q”) takes to mean that contact has been made. There is a good, detailed explanation of this [[http://www.qprox.com/background/capacitance.php | here]].

[[http://www.qprox.co.kr/data/qt140_150_100_datasheet.pdf |Qprox140 Datasheet]]

Once contact has been detected, the Qprox simply outputs +5V (or sinks the circuit to ground) througn the appropriate signal output. Each output functions as a “button” – a simple digital input – to a microcontroller. As the chip does output 5V, more than enough for many loads such as an LED or two, they can operate well independently of a microcontroller for simple controls or testing.

The QT140 is easily configurable with a number of different input and output options making it fairly adaptable to an application’s needs.

!!!'''Applications'''
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The '''QT 104''' is a capacitance sensor, distinguishing itself from the rest of the [[http://www.qprox.com | Qprox lineup]] in that it operates four separate sensor channels independently. It’s function is based on its ability to sense an increase in capacitance in its sense circuit. When capacitance on one of its sensor channels grows, the QT140 (which from here on I will refer to simply as “Q”) takes to mean that contact has been made. There is a good, detailed explanation of this [[http://www.qprox.com/background/capacitance.php | here]].

[[www.qprox.co.kr/data/qt140_150_100_datasheet.pdf |Qprox140 Datasheet]]

Once contact has been detected, the Qprox simply outputs +5V (or sinks the circuit to ground) througn the appropriate signal output. Each output functions as a “button” – a simple digital input – to a microcontroller. As the chip does output 5V, more than enough for many loads such as an LED or two, they can operate well independently of a microcontroller for simple controls or testing.

The QT140 is easily configurable with a number of different input and output options making it fairly adaptable to an application’s needs.

!!!'''Applications'''
----
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!!!%center% Qprox QT140
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www.qprox.co.kr/data/qt140_150_100_datasheet.pdf
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[[www.qprox.co.kr/data/qt140_150_100_datasheet.pdf |Qprox140 Datasheet]]
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!!%center% Qprox QT140 www.qprox.co.kr/data/qt140_150_100_datasheet.pdf
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!!!%center% Qprox QT140
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\\
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www.qprox.co.kr/data/qt140_150_100_datasheet.pdf
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The '''QT 104''' is a capacitance sensor, distinguishing itself from the rest of the [[http://www.qprox.com | Qprox lineup]] in that it operates four separate sensor channels independently. It’s function is based on its ability to sense an increase in capacitance in its sense circuit. When capacitance on one of its sensor channels grows, the QT140 (which from here on I will refer to simply as “Q”) takes to mean that contact has been made.

The Q simply outputs +5V (or sinks the circuit to ground) to signal contact, each
output functions as a “button” – a simple digital input – to a microcontroller. As the chip does output 5V, more than enough for many loads such as an LED or two, they can operate well independently of a microcontroller for simple controls or testing.
to:
The '''QT 104''' is a capacitance sensor, distinguishing itself from the rest of the [[http://www.qprox.com | Qprox lineup]] in that it operates four separate sensor channels independently. It’s function is based on its ability to sense an increase in capacitance in its sense circuit. When capacitance on one of its sensor channels grows, the QT140 (which from here on I will refer to simply as “Q”) takes to mean that contact has been made. There is a good, detailed explanation of this [[http://www.qprox.com/background/capacitance.php | here]].

Once contact has been detected, the Qprox simply outputs +5V (or sinks the circuit to ground) througn the appropriate signal output. Each
output functions as a “button” – a simple digital input – to a microcontroller. As the chip does output 5V, more than enough for many loads such as an LED or two, they can operate well independently of a microcontroller for simple controls or testing.
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The QT 104 is a capacitance sensor, distinguishing itself from the rest of the [[http://www.qprox.com | Qprox lineup]] in that it operates four separate sensor channels independently. It’s function is based on its ability to sense an increase in capacitance in its sense circuit. When capacitance on one of its sensor channels grows, the QT140 (which from here on I will refer to simply as “Q”) takes to mean that contact has been made.
to:
The '''QT 104''' is a capacitance sensor, distinguishing itself from the rest of the [[http://www.qprox.com | Qprox lineup]] in that it operates four separate sensor channels independently. It’s function is based on its ability to sense an increase in capacitance in its sense circuit. When capacitance on one of its sensor channels grows, the QT140 (which from here on I will refer to simply as “Q”) takes to mean that contact has been made.
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!!!'''Applications'''
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//
The QT 104 is a capacitance sensor, distinguishing itself from the rest of the Qprox lineup (www.qprox.com) in that it operates four separate sensor channels independently. It’s function is based on its ability to sense an increase in capacitance in its sense circuit. When capacitance on one of its sensor channels grows, the QT140 (which from here on I will refer to simply as “Q”) takes to mean that contact has been made.
to:
\\
The QT 104 is a capacitance sensor, distinguishing itself from the rest of the [[http://www.qprox.com | Qprox lineup]] in that it operates four separate sensor channels independently. It’s function is based on its ability to sense an increase in capacitance in its sense circuit. When capacitance on one of its sensor channels grows, the QT140 (which from here on I will refer to simply as “Q”) takes to mean that contact has been made.
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%center% !Qprox QT140 www.qprox.co.kr/data/qt140_150_100_datasheet.pdf
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!!%center% Qprox QT140 www.qprox.co.kr/data/qt140_150_100_datasheet.pdf
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%center% !Qprox QT140 www.qprox.co.kr/data/qt140_150_100_datasheet.pdf
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//
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!!!'''Applications'''\\
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!!!'''Electrical Characteristics'''
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'''Pin Descriptions'''//
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!!!'''Pin Descriptions'''//
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Microcontroller Connections
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!!!Microcontroller Connections
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!!!Code Sample
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Typical Behavior
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!!!Typical Behavior
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Application Notes
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!!!Application Notes
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The QT 140 is a capacitance sensor, distinguishing itself from the rest of the Qprox lineup (www.qprox.com) in that it operates four separate sensor channels independently. It’s function is based on its ability to sense an increase in capacitance in its sense circuit. When capacitance on one of its sensor channels grows, the QT140 (which from here on I will refer to simply as “Q”) takes to mean that contact has been made.
to:
The QT 104 is a capacitance sensor, distinguishing itself from the rest of the Qprox lineup (www.qprox.com) in that it operates four separate sensor channels independently. It’s function is based on its ability to sense an increase in capacitance in its sense circuit. When capacitance on one of its sensor channels grows, the QT140 (which from here on I will refer to simply as “Q”) takes to mean that contact has been made.
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Microcontroller Connections
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'''
Code Sample'''\\
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Code Sample
Give a code sample for the microcontroller you developed the example on. Link it to the Code group of the wiki, formatting the link like this:
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Typical Behavior
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The QT 104 is a capacitance sensor, distinguishing itself from the rest of the Qprox lineup (www.qprox.com) in that it operates four separate sensor channels independently. It’s function is based on its ability to sense an increase in capacitance in its sense circuit. When capacitance on one of its sensor channels grows, the QT140 (which from here on I will refer to simply as “Q”) takes to mean that contact has been made.
to:
The QT 140 is a capacitance sensor, distinguishing itself from the rest of the Qprox lineup (www.qprox.com) in that it operates four separate sensor channels independently. It’s function is based on its ability to sense an increase in capacitance in its sense circuit. When capacitance on one of its sensor channels grows, the QT140 (which from here on I will refer to simply as “Q”) takes to mean that contact has been made.
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Microcontroller Connections
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'''Microcontroller Connections'''\\
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Code Sample
Give a code sample for the microcontroller you developed the example on. Link it to the Code group of the wiki, formatting the link like this:
to:
'''Code Sample'''\\
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Typical Behavior
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'''Typical Behavior'''\\
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'''Pin Descriptions'''//
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'''Electrical Characteristics'''

http://tigoe.net/img/monski.jpg
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Applications
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'''Applications'''\\
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Qprox QT140 www.qprox.co.kr/data/qt140_150_100_datasheet.pdf

Initial report by [[~rjm361 | Rich Miller]], 26th of September, 2005.

The QT 104 is a capacitance sensor, distinguishing itself from the rest of the Qprox lineup (www.qprox.com) in that it operates four separate sensor channels independently. It’s function is based on its ability to sense an increase in capacitance in its sense circuit. When capacitance on one of its sensor channels grows, the QT140 (which from here on I will refer to simply as “Q”) takes to mean that contact has been made.

The Q simply outputs +5V (or sinks the circuit to ground) to signal contact, each output functions as a “button” – a simple digital input – to a microcontroller. As the chip does output 5V, more than enough for many loads such as an LED or two, they can operate well independently of a microcontroller for simple controls or testing.

The QT140 is easily configurable with a number of different input and output options making it fairly adaptable to an application’s needs.

Applications
PC peripherals, appliance controls, access systems, instrument panels, security systems, pointing devices, gaming controls, interactive sculpture


Electrical Characteristics



4.3 and 4.4 are from the data sheet. Note that at the top of 4.4 are all the test values for the components of a QProx circuit. In other words, these are parts that we can use.

In my testing, I used the typical 5V Vdd, but used .1µF capacitors for Cs and got reasonably good results. I set the QT140 to sink the PIC inputs to signal a positive contact. This is done by connecting the Output Option pin (16 or OC on the Pin Chart, below) high to +5V, forcing the output pins on the Qprox function to sink -or pull low to ground - the input pins on the PIC. The basic concept is explained fairly well here :
http://www.winpicprog.co.uk/pic_tutorial_extras.htm

Pin Descriptions

The important things to note immediately are the sense channels and the option pins, which we’ve gone over a bit already. The sense channels (SNS1-4, A&B) are paired because a capacitor (Cs) of nominal value - 39nF as a recommended starting point and .1nF as tested – should be placed across each pair of leads. Electrode (Cx) leads can apparently be wired to either A or B, but it is suggested that they be connected to the A pin to take advantage of whatever protection they’ve built in against EM interference. Together, the capacitance of the electrode and the value of capacitor on each channel form a sort of reference point for the Q. When it senses this value increasing, it debounces the switch three times (a built-in feature!) and then signals a contact on the sensor’s corresponding output. Not incidentally, changing the values of Cs and Cx changes the sensitivity of the electrode. A higher value capacitor (Cs) makes the electrode more sensitive.



The other thing to note here is the application of the option pins, 16, 17, 24 and 25 on the chart. Pin 16 is the Output Option Pin, outlined above. Pin 17 is the AKS, or Adjacent Key Suppression, which you can see was not strapped in testing though it should have been. This acts as it sounds, by suppressing false signals from keys that are close to the true signal. Strapping it high turns AKS on and low turns it off. No negative effects from letting it float have so far been encountered.

The functions of the OPT pins is somewhat more complicated. The options are for the number of seconds a pin can be triggered before being reset by the chip. In the infinite range, which was chosen for testing relating to needs of another specific application, this reset function is sacrificed. The toggle option toggles the states from high to low or vice versa with each independent contact.











Microcontroller Connections
Below is the wiring schematic for connecting the Qprox to a PIC 18F252. Note again that the QProx Output Option pin (16 or OC on the Pin Chart above) is pulled high. The inputs to the PIC (B.0-B.3) are wired accordingly with 1K? resistors pulling those pins high. Just for kicks, I wired the PIC to sink the LEDs, too. The only discrepancy from the actual test circuit is the use of 1K? resistors on the Sens pins. This was suggested as a means to protect the chip from stray voltage discharges, but testing proved the electrodes to be too insensitive in the tested configuration otherwise.


Code Sample
Give a code sample for the microcontroller you developed the example on. Link it to the Code group of the wiki, formatting the link like this:
[[Code.RichQproxTest | QproxTest]]

Typical Behavior
In limited testing so far, the QT140 has proved to be a hardy, versatile sensor, consistently producing correct output signals despite varying conditions and inconsistent wiring? Each time the power is cycled, the QT140 re-evaluates each input and sets a new base capacitance value if necessary. There is also a reset pin that will accomplish the same thing without cycling the power. The beauty of this is that the sensor can quickly be adjusted to changing conditions. In testing, the power to the circuit was turned off, an electrode dropped into a plastic tub of tap water, and then the power turned back on. The sense wire, the water and the tub itself had all become parts of the sense circuit.

Other tests performed involved shaping of the electrodes. Flat, dished (concave), looped and a short strip of copper mesh were all soldered to leads and tested in the circuit, as was a plain wire. The plain wire tripped the circuit at each touch. The flat electrode triggered the sensor when a finger was positioned within Ľ” of either side of it. The dished electrode appeared to focus the field to the center of the concave side so that sense was acquired within ˝” if the surface, while the convex side had to be touched to trigger the sensor. The strip was not much more sensitive than the bare wire.

Application Notes
Still to come…