Reports.EMG History

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!!Charleton University Schematic:
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Charleton University Schematic
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!!Advancer Technologies Schematic
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Advanced Technologies Schematic
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!!Charleton University Schematic
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Charleton University Schematic
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!!Advanced Technologies Schematic
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Advanced Technologies Schematic
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[+ Charleton University Schematic: +]
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!!Charleton University Schematic:
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[+ Advancer Technologies Schematic +]
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!!Advancer Technologies Schematic
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!! Charleton University Schematic
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!!Charleton University Schematic
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!! Advanced Technologies Schematic
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!!Advanced Technologies Schematic
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[+ Charleton University Schematic +]
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!! Charleton University Schematic
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[+ Advanced Technologies Schematic +]
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!! Advanced Technologies Schematic
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Some non medical uses of EMG:\\
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Some non medical uses of EMG:
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*[http://www.youtube.com/watch?v=aMPNjMVlr8A&feature=related | EMG deciphering silent speech]]
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*[[http://www.youtube.com/watch?v=aMPNjMVlr8A&feature=related | EMG deciphering silent speech]]
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Attach:EMG_Overview.jpg
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Attach:EMG.jpg
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!!!Application Notes
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!!!Applications Notes
[[http://telemyograph.com/ | Telemyograph Project. I helped to make the EMG portion of this project ]]
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Some non medical uses of EMG:\\
*[[http://www.youtube.com/watch?v=dhRJqZ33_3I | EMG controlled music]]
*[[http://www.youtube.com/watch?v=M9W5Fog_-Io&feature=related | EMG controlled Quadcopter]]
*[http://www.youtube.com/watch?v=aMPNjMVlr8A&feature=related | EMG deciphering silent speech]]
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Charleton University Schematic:\\
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!!!Application Notes
Describe your own application of the sensor. Link to any external documentation of your project, and discuss how you got the sensor to do what you needed it to.(:Rating1: 100:)
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!!!Application Notes
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[+ Charleton University Schematic +]
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[+ Advanced Technologies Schematic +]
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Attach:EMG_CharletonUniversitySchematic
Attach:EMG_AdvancedTechnologiesSchematic
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Attach:EMG_CharletonUniversitySchematic.jpg
Attach:EMG_AdvancedTechnologiesSchematic.jpg
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Charleton University Schematic:
Attach:EMG_CharletonUniversitySchematic.png
Attach:EMG_AdvancedTechnologiesSchematic.png
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Charleton University Schematic:\\
Attach:EMG_CharletonUniversitySchematic
Attach:EMG_AdvancedTechnologiesSchematic
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!!! Pin Descriptions
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!!! Schematics
Charleton University Schematic:
Attach:EMG_CharletonUniversitySchematic.png
Attach:EMG_AdvancedTechnologiesSchematic.png
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I had also found that Advancer Technologies has a kit and tutorial on building your own EMG sensor. The principle is the same, but the chips and layout is different. Again you can purchase the [[ http://search.digikey.com/us/en/products/INA106KP/INA106KP-ND/251075 | INA106]] and [[http://search.digikey.com/us/en/products/TL072CN/497-2201-5-ND/599534 | TL072]] from digikey. And all the other electronic parts can be purchases at any electronic store. Obviously you can purchase them from digikey, but finding relatively simple things on that website can be an art in and of itself.
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Describe some typical applications of this sensor. You can often get this from the datasheet, but a few examples from companies or individuals who've used it would be useful as well.
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!!!Typical Behavior
Describe the behavior of the sensor when you use it to sense something. Note any peculiarities that you had to work around, or things that might affect someone else's use. Graphs and images are useful here.
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!!!Behavior
When the EMG unit, based on the Charleton University schematic was first build, the reading that were received were a little erratic. Since the amplifier was at such a high gain, looking for pico volts of change, I was getting all kinds of noise. It seems obvious in retrospect, but at the time I was not certain as to what was causing this. At the time I built a RC filter to get rid of some of the noise, but after doing it programmatically proved a little more accurate and responsive at the time.
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Since this is a sensor you have to build, and there are different versions of the schematic I'm putting links to the IC chips that are used.
[+big+] Charleton University Schematic:
*[[ http://www.analog.com/static/imported-files/Data_Sheets/AD620.pdf || AD620 ]]
*
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Since this is a sensor you have to build, and there are different versions of the schematic I'm putting links to the IC chips that are used. \\
[+ Charleton University Schematic: +]
*[[
http://www.analog.com/static/imported-files/Data_Sheets/AD620.pdf | AD620 ]]
*[[http://www.analog.com/static/imported-files/Data_Sheets/OP97.pdf| OP97]]
*[[http://www.ti.com/lit/ds/symlink/lm741.pdf | LM741]]
[+ Advancer Technologies Schematic +]
*[[http://www.ti.com/lit/ds/symlink/ina106.pdf | INA106]]
*[[http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00000490.pdf | TL072]]
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Give a list of the pins, and a pin diagram as appropriate. Detail the function of each pin in a short paragraph following the list.


!!!Microcontroller Connections
Explain how to connect the sensor to a microcontroller or computer. Include a schematic and any other necessary diagrams. Make sure to include a list of every part in the schematic.
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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.myCodeSample | Code Sample]]=]

In your code sample, show how to do the following:
* read the sensor's output and save in a variable.
* convert the sensor's output range to a voltage range corresponding to the microcontroller's analog-to-digital range.
* convert from voltage to the physical property that the sensor measures. Provide the appropriate math in a separate function, as needed.
* print the raw sensor reading, the voltage reading, and the physical property reading serially
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This is coming.
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<ul> Charleton University Schematic:
<li>[[ http://www.analog.com/static/imported-files/Data_Sheets/AD620.pdf || AD620 ]]</li>
<li></li>
</ul>
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[+big+] Charleton University Schematic:
*[[ http://www.analog.com/static/imported-files/Data_Sheets/AD620.pdf || AD620 ]]
*
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The [[http://search.digikey.com/us/en/products/AD620ANZ/AD620ANZ-ND/750967 | AD620]], [[http://search.digikey.com/us/en/products/OP97FPZ/OP97FPZ-ND/820376 | OP97]], and the [[http://search.digikey.com/us/en/products/LM741CN%2FNOPB/LM741CNNS-ND/6322 || LM741 ]] chip can be purchased through [[http://www.digikey.com | digikey]]. The only other anomaly are the two [[http://search.digikey.com/us/en/products/RNF14FTD24R9/RNF14FTD24R9CT-ND/1974968 | 24.9K resistors]], which you can also pick up at digikey.
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The [[http://search.digikey.com/us/en/products/AD620ANZ/AD620ANZ-ND/750967 | AD620]], [[http://search.digikey.com/us/en/products/OP97FPZ/OP97FPZ-ND/820376 | OP97]], and the [[http://search.digikey.com/us/en/products/LM741CN%2FNOPB/LM741CNNS-ND/6322 | LM741 ]] chip can be purchased through [[http://www.digikey.com | digikey]]. The only other anomaly are the two [[http://search.digikey.com/us/en/products/RNF14FTD24R9/RNF14FTD24R9CT-ND/1974968 | 24.9K resistors]], which you can also pick up at digikey.
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The [[http://search.digikey.com/us/en/products/AD620ANZ/AD620ANZ-ND/750967 || AD620]], [[http://search.digikey.com/us/en/products/OP97FPZ/OP97FPZ-ND/820376 || OP97]], and the [[http://search.digikey.com/us/en/products/LM741CN%2FNOPB/LM741CNNS-ND/6322 || LM741 ]] chip can be purchased through [[http://www.digikey.com | digikey]]. The only other anomaly are the two [[http://search.digikey.com/us/en/products/RNF14FTD24R9/RNF14FTD24R9CT-ND/1974968 || 24.9K resistors]], which you can also pick up at digikey.
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The [[http://search.digikey.com/us/en/products/AD620ANZ/AD620ANZ-ND/750967 | AD620]], [[http://search.digikey.com/us/en/products/OP97FPZ/OP97FPZ-ND/820376 | OP97]], and the [[http://search.digikey.com/us/en/products/LM741CN%2FNOPB/LM741CNNS-ND/6322 || LM741 ]] chip can be purchased through [[http://www.digikey.com | digikey]]. The only other anomaly are the two [[http://search.digikey.com/us/en/products/RNF14FTD24R9/RNF14FTD24R9CT-ND/1974968 | 24.9K resistors]], which you can also pick up at digikey.
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Electromyographic sensors measure the electrical activity produced by the muscle during contraction. When muscles are active they generate an electrical potential. That potential can be read and measured. Electromyography has mostly been in use
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Electromyographic sensors measure the electrical activity produced by the muscle during contraction. When muscles are active they generate an electrical potential. That potential can be read and measured. Electromyography has mostly been in use in the medical field and rather pricey, but with cheaper microcontrollers and relatively simple schematics it is possible to build a consumer grade version.
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The original sensor I built was through [[http://www.biomed.engsoc.org/node/30 | Charleton University]].
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The original sensor I built was through [[http://www.biomed.engsoc.org/node/30 | Charleton University]].
The [[http://search.digikey.com/us/en/products/AD620ANZ/AD620ANZ-ND/750967 || AD620]], [[http://search.digikey.com/us/en/products/OP97FPZ/OP97FPZ-ND/820376 || OP97]], and the [[http://search.digikey.com/us/en/products/LM741CN%2FNOPB/LM741CNNS-ND/6322 || LM741 ]] chip can be purchased through [[http://www.digikey.com | digikey]]. The only other anomaly are the two [[http://search.digikey.com/us/en/products/RNF14FTD24R9/RNF14FTD24R9CT-ND/1974968 || 24.9K resistors]], which you can also pick up at digikey.
The other parts are standard parts that you can pick up either at radioshack or order from any electronic supplier.
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Put a link to the datasheet at the top. Also link any retail sources, for example if you're using a breakout board, or any other parts that making the sensor easier.

Give the voltage and amperage ranges, and any other relevant electrical data.

Describe the electrical changes when the sensor senses whatever physical changes it senses. Include graphs as needed.
to:
Since this is a sensor you have to build, and there are different versions of the schematic I'm putting links to the IC chips that are used.
<ul> Charleton University Schematic:
<li>[[ http://www
.analog.com/static/imported-files/Data_Sheets/AD620.pdf || AD620 ]]</li>
<li></li>
</ul>
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Describe your own application of the sensor. Link to any external documentation of your project, and discuss how you got the sensor to do what you needed it to.(:Rating1: 100:)
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Describe your own application of the sensor. Link to any external documentation of your project, and discuss how you got the sensor to do what you needed it to.(:Rating1: 100:)
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Initial report by [=[[~ecl303 | Ezer Longinus]]=], 23, 02, 2012

Electromyographic sensors measure the electrical activity produced by the muscle during contraction. When muscles are active they generate an electrical potential. That potential can be read and measured. Electromyography has mostly been in use

!!!Sources
The original sensor I built was through [[http://www.biomed.engsoc.org/node/30 | Charleton University]].


!!!Applications

Describe some typical applications of this sensor. You can often get this from the datasheet, but a few examples from companies or individuals who've used it would be useful as well.

!!!Electrical Characteristics
Put a link to the datasheet at the top. Also link any retail sources, for example if you're using a breakout board, or any other parts that making the sensor easier.

Give the voltage and amperage ranges, and any other relevant electrical data.

Describe the electrical changes when the sensor senses whatever physical changes it senses. Include graphs as needed.

!!! Pin Descriptions
Give a list of the pins, and a pin diagram as appropriate. Detail the function of each pin in a short paragraph following the list.


!!!Microcontroller Connections
Explain how to connect the sensor to a microcontroller or computer. Include a schematic and any other necessary diagrams. Make sure to include a list of every part in the schematic.

!!!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.myCodeSample | Code Sample]]=]

In your code sample, show how to do the following:
* read the sensor's output and save in a variable.
* convert the sensor's output range to a voltage range corresponding to the microcontroller's analog-to-digital range.
* convert from voltage to the physical property that the sensor measures. Provide the appropriate math in a separate function, as needed.
* print the raw sensor reading, the voltage reading, and the physical property reading serially

!!!Typical Behavior
Describe the behavior of the sensor when you use it to sense something. Note any peculiarities that you had to work around, or things that might affect someone else's use. Graphs and images are useful here.

!!!Application Notes
Describe your own application of the sensor. Link to any external documentation of your project, and discuss how you got the sensor to do what you needed it to.(:Rating1: 100:)