Reports.QProx History

Hide minor edits - Show changes to output

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'''To see this report with images click [[http://stage.itp.nyu.edu/~mjh348/classes/images/sensorworkshop/QProx/datasheetsummary.html | here]].'''

''images copied and added to the wiki. [[~tigoe]]''
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Original report: [[~mjh348 |Michael Horan]]
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There is no restriction to the design of the electrode, provided you use common sense. Kirchoff’s Current Law should be considered when creating your electrode. It states that a sensor’s field current must complete a loop, returning to its source for the capacitance to be sensed. Remember that the human body naturally has several picofarads of ‘free space’ capacitance to the local environment, which is two times more than needed. A field can be shaped by limiting it with ground wire (a grounded wire will prevent the \\
to:
There is no restriction to the design of the electrode, provided you use common sense.

Attach:KirchoffLaw.gif

Kirchoff’s Current Law should be considered when creating your electrode. It states that a sensor’s field current must complete a loop, returning to its source for the capacitance to be sensed. Remember that the human body naturally has several picofarads of ‘free space’ capacitance to the local environment, which is two times more than needed. A field can be shaped by limiting it with ground wire (a grounded wire will prevent the \\
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'''To see this report with images click [[http://stage.itp.nyu.edu/~mjh348/classes/images/sensorworkshop/QProx/datasheetsummary.html | here]].

images copied and added to the wiki. [[~tigoe]]'''
to:
'''To see this report with images click [[http://stage.itp.nyu.edu/~mjh348/classes/images/sensorworkshop/QProx/datasheetsummary.html | here]].'''

''
images copied and added to the wiki. [[~tigoe]]''
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images copied and added to the wiki. [[~tigoe]]''
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images copied and added to the wiki. [[~tigoe]]'''
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'''To see this report with images click [[http://stage.itp.nyu.edu/~mjh348/classes/images/sensorworkshop/QProx/datasheetsummary.html | here]].''
to:
'''To see this report with images click [[http://stage.itp.nyu.edu/~mjh348/classes/images/sensorworkshop/QProx/datasheetsummary.html | here]].

images copied and added to the wiki. [[~tigoe]]
''
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If a detection exceeds the timer setting, the timer forces a full recalibration. This allows for full\\
functionality
even if the conditions change (e.g., if something falls on the electrode).\\
to:
If a detection exceeds the timer setting, the timer forces a full recalibration. This allows for full functionality even if the conditions change (e.g., if something falls on the electrode).
Deleted line 55:
\\
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Gain affects the sensor’s sensitivity. Connected to power (Vdd), sensitivity will increase. Sensitivity \\
can also be increased by using a larger electrode or a larger capacitor (Cs). Likewise, sensitivity will\\
decrease
when gain is connected to ground (Vss), using a smaller electrode or a smaller capacitor (Cs).\\
Remember, though, that increasing Cs decreases response time but increases resolution.\\
Experimentation will be helpful.\\
\\
to:
Gain affects the sensor’s sensitivity. Connected to power (Vdd), sensitivity will increase. Sensitivity can also be increased by using a larger electrode or a larger capacitor (Cs). Likewise, sensitivity will decrease when gain is connected to ground (Vss), using a smaller electrode or a smaller capacitor (Cs).Remember, though, that increasing Cs decreases response time but increases resolution.\\
Experimentation will be helpful.
Changed lines 61-70 from:
There is no restriction to the design of the electrode, provided you use common sense. \\
Kirchoff’s Current Law should be considered when creating your electrode. It states that a sensor’s \\
field current must complete a loop, returning to its source for the capacitance to be sensed. \\
Remember that the human body naturally has several picofarads of ‘free space’ capacitance to the\\
local
environment, which is two times more than needed. \\
A field can be shaped by limiting it with ground wire (a grounded wire will prevent the \\
capacitance field from extending beyond it).\\

\\
\\
to:
There is no restriction to the design of the electrode, provided you use common sense. Kirchoff’s Current Law should be considered when creating your electrode. It states that a sensor’s field current must complete a loop, returning to its source for the capacitance to be sensed. Remember that the human body naturally has several picofarads of ‘free space’ capacitance to the local environment, which is two times more than needed. A field can be shaped by limiting it with ground wire (a grounded wire will prevent the \\
capacitance field from extending beyond it).
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''It means Cs is an order of magnitude or more greater than Cx"''
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Attach:qproxscheme.gif
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Charge-Transfer touch sensor\\
\\
'''To see this report with images click [[http://stage.itp.nyu.edu/~mjh348/classes/images/sensorworkshop/QProx/datasheetsummary.html | here]].'''\\
\\

Projects a proximity field through the air or any insulator to detect near-proximity or touch, specifically\\
designed
for human interfaces (panels, appliances, toys, or lighting controls). \\
\\
to:
Charge-Transfer touch sensor

'''To see this report with images click [[http://stage.itp.nyu.edu/~mjh348/classes/images/sensorworkshop/QProx/datasheetsummary.html | here]].''

Projects a proximity field through the air or any insulator to detect near-proximity or touch, specifically
designed
for human interfaces (panels, appliances, toys, or lighting controls).
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\\
\\
to:
[Attach:qproximg.gif]
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to:
[Attach:qproxboard.gif]
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The IC continuously discharges ‘bursts’ storing voltage in Cs. As the electrode is touched, \\
voltage dumps from CS, which is recognized by the IC, sending a message through its ‘OUT’ pin. \\
Utilizes
HeartBeat™ Output, a built-in feature that constantly checks for the ‘health’ of the IC \\
(this feature can be sampled by using a pull-down resistor on out & feeding the resulting \\
pulse
to a counter).\\
\\
to:
The IC continuously discharges ‘bursts’ storing voltage in Cs. As the electrode is touched,
voltage dumps from CS, which is recognized by the IC, sending a message through its ‘OUT’ pin.
Utilizes HeartBeat™ Output, a built-in feature that constantly checks for the ‘health’ of the IC
(this feature can be sampled by using a pull-down resistor on out & feeding the resulting
pulse to a counter).
Changed lines 42-44 from:
The IC requires three (3) successive detections to create an output. This prevents an \\
accidental trigger by stray energy.\\
\\
to:
The IC requires three (3) successive detections to create an output. This prevents an
accidental trigger by stray energy.
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\\
to:
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''''To see this report with images click [[http://stage.itp.nyu.edu/~mjh348/classes/images/sensorworkshop/QProx/datasheetsummary.html | here]].''''\\
to:
'''To see this report with images click [[http://stage.itp.nyu.edu/~mjh348/classes/images/sensorworkshop/QProx/datasheetsummary.html | here]].'''\\
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''To see this report with images click'' [[http://stage.itp.nyu.edu/~mjh348/classes/images/sensorworkshop/QProx/datasheetsummary.html | here]].\\
to:
''''To see this report with images click [[http://stage.itp.nyu.edu/~mjh348/classes/images/sensorworkshop/QProx/datasheetsummary.html | here]].''''\\
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\\
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''To see this report with images click'' [[http://stage.itp.nyu.edu/~mjh348/classes/images/sensorworkshop/QProx/datasheetsummary.html | here]].\\
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''QT113''\\
to:
''QT113'' [[http://www.qprox.com/downloads/datasheets/qt113_105.pdf | Datasheet]]\\
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What does “>>” mean???
to:
What does “>>” mean (as in "Cs >> Cx")???
Changed lines 66-68 from:
A field can be shaped by limiting it with ground wire (a grounded wire will prevent the capacitance field from \\
extending beyond it).\\
to:
A field can be shaped by limiting it with ground wire (a grounded wire will prevent the \\
capacitance field from extending beyond it).\\
Changed lines 23-24 from:
*A 100nF (0.1 uF) capacitor must be placed between Vdd & Vss (yes, power and ground) for the IC to \\
work properly.
to:
*A 100nF (0.1 uF) capacitor must be placed between Vdd & Vss (yes, power and ground)\\
for
the IC to work properly.
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The IC continuously discharges ‘bursts’ storing voltage in Cs. As the electrode is touched, //
to:
The IC continuously discharges ‘bursts’ storing voltage in Cs. As the electrode is touched, \\
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Gain affects the sensor’s sensitivity. Connected to power (Vdd), sensitivity will increase. Sensitivity
to:
Gain affects the sensor’s sensitivity. Connected to power (Vdd), sensitivity will increase. Sensitivity \\
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'''Schematic'''\\
to:
'''Schematic'''
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work properly.\\
to:
work properly.
Changed line 24 from:
work properly.
to:
work properly.\\
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to:
\\
Changed lines 7-11 from:
designed for human interfaces (panels, appliances, toys, or lighting controls).

8-pin PDIP Integrated Circuit (IC)
to:
designed for human interfaces (panels, appliances, toys, or lighting controls). \\
\\

8-pin PDIP Integrated Circuit (IC)\\
\\
\\
Changed lines 31-34 from:
The IC continuously discharges ‘bursts’ storing voltage in Cs. As the electrode is touched, voltage dumps \\
from CS, which is recognized by the IC, sending a message through its ‘OUT’ pin. Utilizes HeartBeat™ Output,\\
a
built-in feature that constantly checks for the ‘health’ of the IC (this feature can be sampled by using a \\
pull-down resistor on out & feeding the resulting pulse to a counter).\\
to:
The IC continuously discharges ‘bursts’ storing voltage in Cs. As the electrode is touched, //
voltage dumps from CS, which is recognized by the IC, sending a message through its ‘OUT’ pin. \\
Utilizes HeartBeat™ Output, a built-in feature that constantly checks for the ‘health’ of the IC \\
(this feature can be sampled by using a pull-down resistor on out & feeding the resulting \\
pulse to a counter).\\
Changed lines 39-40 from:
The IC requires three (3) successive detections to create an output. This prevents an accidental trigger by \\
stray energy.\\
to:
The IC requires three (3) successive detections to create an output. This prevents an \\
accidental trigger by stray energy.\\
Changed lines 43-44 from:
If a detection exceeds the timer setting, the timer forces a full recalibration. This allows for full functionality \\
even if the conditions change (e.g., if something falls on the electrode).\\
to:
If a detection exceeds the timer setting, the timer forces a full recalibration. This allows for full\\
functionality even if the conditions change (e.g., if something falls on the electrode).\\
Changed lines 54-57 from:
Gain affects the sensor’s sensitivity. Connected to power (Vdd), sensitivity will increase. Sensitivity can also \\
be increased by using a larger electrode or a larger capacitor (Cs). Likewise, sensitivity will decrease when \\
gain is connected to ground (Vss), using a smaller electrode or a smaller capacitor (Cs). Remember, though, \\
that
increasing Cs decreases response time but increases resolution. Experimentation will be helpful.\\
to:
Gain affects the sensor’s sensitivity. Connected to power (Vdd), sensitivity will increase. Sensitivity
can also be increased by using a larger electrode or a larger capacitor (Cs). Likewise, sensitivity will\\
decrease
when gain is connected to ground (Vss), using a smaller electrode or a smaller capacitor (Cs).\\
Remember, though
, that increasing Cs decreases response time but increases resolution.\\
Experimentation will be helpful.\\
Changed lines 61-65 from:
There is no restriction to the design of the electrode, provided you use common sense and experimentation.
Kirchoff’s Current Law should be considered when creating your
electrode. It states that a sensor’s field current \\
must complete a loop, returning to its source for the capacitance to be sensed. Remember that the human body \\
naturally has several picofarads of ‘free space’ capacitance to the local environment, which is two times more than \\
needed. \\
to:
There is no restriction to the design of the electrode, provided you use common sense. \\
Kirchoff’s Current Law should be considered when creating your
electrode. It states that a sensor’s \\
field current must complete a loop, returning to its source for the capacitance to be sensed. \\
Remember
that the human body naturally has several picofarads of ‘free space’ capacitance to the\\
local
environment, which is two times more than needed. \\
Changed lines 1-6 from:
'''QProx Sensor'''
''QT113''
Quantum Research Group
Charge-Transfer touch sensor

Projects a proximity field through the air or any insulator to detect near-proximity or touch, specifically
to:
'''QProx Sensor'''\\
''QT113''\\
Quantum Research Group\\
Charge-Transfer touch sensor\\

Projects a proximity field through the air or any insulator to detect near-proximity or touch, specifically\\
Changed lines 21-22 from:
'''Schematic'''
*A 100nF (0.1 uF) capacitor must be placed between Vdd & Vss (yes, power and ground) for the IC to
to:
'''Schematic'''\\
*A 100nF (0.1 uF) capacitor must be placed between Vdd & Vss (yes, power and ground) for the IC to \\
Changed line 29 from:
'''How it works'''
to:
'''How it works'''\\
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pull-down resistor on out & feeding the resulting pulse to a counter).


Detection Integrator
to:
pull-down resistor on out & feeding the resulting pulse to a counter).\\
\\

'''
Detection Integrator'''\\
Changed lines 38-40 from:
stray energy.

Timer
to:
stray energy.\\
\\
'''Timer'''\\
Changed lines 42-48 from:
even if the conditions change (e.g., if something falls on the electrode).

Strap Option
These are read only on power up.
Note: Option pins should never be floating
DC Mode Output – active-low on detection, or until Max On-Duration expires
Toggle Mode Output – on/off mode (for power loads), fixed at 10s
to:
even if the conditions change (e.g., if something falls on the electrode).\\
\\
'''
Strap Option'''\\
These are read only on power up. \\
Note: Option pins should never be floating\\
DC Mode Output – active-low on detection, or until Max On-Duration expires\\
Toggle Mode Output – on/off mode (for power loads), fixed at 10s\\
Changed lines 50-51 from:
Gain
to:
\\
'''Gain'''\\
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that increasing Cs decreases response time but increases resolution. Experimentation will be helpful.

Electrode Design
to:
that increasing Cs decreases response time but increases resolution. Experimentation will be helpful.\\
\\
'''
Electrode Design'''\\
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needed.



to:
needed. \\
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extending beyond it).


to:
extending beyond it).\\

\\
\\
'''Questions'''\\
Changed lines 1-3 from:
[@
QProx Sensor
QT113
to:
'''QProx Sensor'''
''QT113''
Changed lines 12-24 from:
1) Power (2.45V – 5.25V)
2) Out (To PIC)
3) Option 1 (See Strap Option)
4) Option 2 (See Strap Option)
5) Gain (Changes Sensitivity)
6) Electrode Connect 1
7) Electrode Connect 2
8) Ground

Schematic


-
A 100nF (0.1 uF) capacitor must be placed between Vdd & Vss (yes, power and ground) for the IC to
to:
#Power (2.45V – 5.25V)
#Out (To PIC)
#Option 1 (See Strap Option)
#Option 2 (See Strap Option)
#Gain (Changes Sensitivity)
#Electrode Connect 1
#Electrode Connect 2
#Ground

'''Schematic'''
*
A 100nF (0.1 uF) capacitor must be placed between Vdd & Vss (yes, power and ground) for the IC to
Changed lines 24-32 from:
- A capacitor (Cs) (10 – 500 nF) should be placed between Sns1 & Sns2.
- A resistor (1 – 50K?) should be placed between Sns2 & the electrode (sensor).
- Gain should be connected to power or ground (see Gain).


How it works
The IC continuously discharges ‘bursts’ storing voltage in Cs. As the electrode is touched, voltage dumps from CS, which is recognized by the IC, sending a message through its ‘OUT’ pin. Utilizes HeartBeat™ Output, a built-in feature that constantly checks for the ‘health’ of the IC (this feature can be sampled by using a pull-down resistor on out & feeding the resulting pulse to a counter).
to:
*A capacitor (Cs) (10 – 500 nF) should be placed between Sns1 & Sns2.
*A resistor (1 – 50K?) should be placed between Sns2 & the electrode (sensor).
*Gain should be connected to power or ground (see Gain).


'''How it works'''
The IC continuously discharges ‘bursts’ storing voltage in Cs. As the electrode is touched, voltage dumps \\
from CS, which is recognized by the IC, sending a message through its ‘OUT’ pin. Utilizes HeartBeat™ Output,\\
a
built-in feature that constantly checks for the ‘health’ of the IC (this feature can be sampled by using a \\
pull-down resistor on out & feeding the resulting pulse to a counter).
Changed lines 37-38 from:
The IC requires three (3) successive detections to create an output. This prevents an accidental trigger by stray energy.
to:
The IC requires three (3) successive detections to create an output. This prevents an accidental trigger by \\
stray energy.
Changed lines 41-42 from:
If a detection exceeds the timer setting, the timer forces a full recalibration. This allows for full functionality even if the conditions change (e.g., if something falls on the electrode).
to:
If a detection exceeds the timer setting, the timer forces a full recalibration. This allows for full functionality \\
even if the conditions change (e.g., if something falls on the electrode).
Changed lines 52-53 from:
Gain affects the sensor’s sensitivity. Connected to power (Vdd), sensitivity will increase. Sensitivity can also be increased by using a larger electrode or a larger capacitor (Cs). Likewise, sensitivity will decrease when gain is connected to ground (Vss), using a smaller electrode or a smaller capacitor (Cs). Remember, though, that increasing Cs decreases response time but increases resolution. Experimentation will be helpful.
to:
Gain affects the sensor’s sensitivity. Connected to power (Vdd), sensitivity will increase. Sensitivity can also \\
be increased by using a larger electrode or a larger capacitor (Cs). Likewise, sensitivity will decrease when \\
gain is connected to ground (Vss), using a smaller electrode or a smaller capacitor (Cs). Remember, though, \\
that increasing Cs decreases response time but increases resolution. Experimentation will be helpful.
Changed lines 59-69 from:
Kirchoff’s Current Law should be considered when creating your electrode. It states that a sensor’s field current must complete a loop, returning to its source for the capacitance to be sensed. Remember that the human body naturally has several picofarads of ‘free space’ capacitance to the local environment, which is two times more than needed.





A field can be shaped by limiting it with ground wire (a grounded wire will prevent the capacitance field from extending beyond it).
to:
Kirchoff’s Current Law should be considered when creating your electrode. It states that a sensor’s field current \\
must complete a loop, returning to its source for the capacitance to be sensed. Remember that the human body \\
naturally has several picofarads of ‘free space’ capacitance to the local environment, which is two times more than \\
needed.





A field can be shaped by limiting it with ground wire (a grounded wire will prevent the capacitance field from \\
extending beyond it).
Deleted line 74:
@]
Changed line 7 from:
Projects a proximity field through the air or any insulator to detect near-proximity or touch, specifically\\
to:
Projects a proximity field through the air or any insulator to detect near-proximity or touch, specifically
Changed line 25 from:
- A 100nF (0.1 uF) capacitor must be placed between Vdd & Vss (yes, power and ground) for the IC to \\
to:
- A 100nF (0.1 uF) capacitor must be placed between Vdd & Vss (yes, power and ground) for the IC to
Changed lines 7-8 from:
Projects a proximity field through the air or any insulator to detect near-proximity or touch, specifically designed for human interfaces (panels, appliances, toys, or lighting controls).
to:
Projects a proximity field through the air or any insulator to detect near-proximity or touch, specifically\\
designed for human interfaces (panels, appliances, toys, or lighting controls).
Changed lines 25-26 from:
- A 100nF (0.1 uF) capacitor must be placed between Vdd & Vss (yes, power and ground) for the IC to work properly.
to:
- A 100nF (0.1 uF) capacitor must be placed between Vdd & Vss (yes, power and ground) for the IC to \\
work properly.
Added lines 1-64:
[@
QProx Sensor
QT113
Quantum Research Group
Charge-Transfer touch sensor

Projects a proximity field through the air or any insulator to detect near-proximity or touch, specifically designed for human interfaces (panels, appliances, toys, or lighting controls).

8-pin PDIP Integrated Circuit (IC)


1) Power (2.45V – 5.25V)
2) Out (To PIC)
3) Option 1 (See Strap Option)
4) Option 2 (See Strap Option)
5) Gain (Changes Sensitivity)
6) Electrode Connect 1
7) Electrode Connect 2
8) Ground

Schematic


- A 100nF (0.1 uF) capacitor must be placed between Vdd & Vss (yes, power and ground) for the IC to work properly.
- A capacitor (Cs) (10 – 500 nF) should be placed between Sns1 & Sns2.
- A resistor (1 – 50K?) should be placed between Sns2 & the electrode (sensor).
- Gain should be connected to power or ground (see Gain).


How it works
The IC continuously discharges ‘bursts’ storing voltage in Cs. As the electrode is touched, voltage dumps from CS, which is recognized by the IC, sending a message through its ‘OUT’ pin. Utilizes HeartBeat™ Output, a built-in feature that constantly checks for the ‘health’ of the IC (this feature can be sampled by using a pull-down resistor on out & feeding the resulting pulse to a counter).


Detection Integrator
The IC requires three (3) successive detections to create an output. This prevents an accidental trigger by stray energy.

Timer
If a detection exceeds the timer setting, the timer forces a full recalibration. This allows for full functionality even if the conditions change (e.g., if something falls on the electrode).

Strap Option
These are read only on power up.
Note: Option pins should never be floating
DC Mode Output – active-low on detection, or until Max On-Duration expires
Toggle Mode Output – on/off mode (for power loads), fixed at 10s


Gain
Gain affects the sensor’s sensitivity. Connected to power (Vdd), sensitivity will increase. Sensitivity can also be increased by using a larger electrode or a larger capacitor (Cs). Likewise, sensitivity will decrease when gain is connected to ground (Vss), using a smaller electrode or a smaller capacitor (Cs). Remember, though, that increasing Cs decreases response time but increases resolution. Experimentation will be helpful.

Electrode Design
There is no restriction to the design of the electrode, provided you use common sense and experimentation.
Kirchoff’s Current Law should be considered when creating your electrode. It states that a sensor’s field current must complete a loop, returning to its source for the capacitance to be sensed. Remember that the human body naturally has several picofarads of ‘free space’ capacitance to the local environment, which is two times more than needed.





A field can be shaped by limiting it with ground wire (a grounded wire will prevent the capacitance field from extending beyond it).




What does “>>” mean???
@]