Want to design an Electromyography amplifier circuit.


I am trying to make an Electromyography amplifier circuit using the differential amplifier ic AD620 and the operational amplifiers TL072. I want to take my biceps voltage for this project. I am using a 5V DC supply from Arduino to power my amplifiers.

Please suggest me some way to test it. I am trying to measure my biceps voltage but there is no response in the multimeter.

I have sent the amplified output to the A0 Pin of Arduino

by Dhiman
October 20, 2017

Apparently the signal is in the range 50uV to 20mV. You will need a gain of 25 up to 100,000 to see this on an Arduino, possibly with a 10Hz ac to dc converter. I assume you're not using needles (physician only in some states of US) so the results can be very variable and dependent on good electrode design. A way of testing is to use a signal generator set at about 10hz and a few mV. ffi wiki 'electromyography'

by mikerogerswsm
October 21, 2017

This is a fascinating subject, thanks for raising it. There is a lot of information here: https://www.hindawi.com/journals/mpe/2015/356028/. Please note that it is a small ac signal, you need filters and ac/dc conversion.

by mikerogerswsm
October 21, 2017
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