The following is when the right leg electrode was placed. The waveform noises at the end are due to my clicking the mouse to take the screen shot
The following is when the right leg electrode was removed.
So the inverting circuit and feedback is fully working, or can simple grounding do the trick?
Ok here is what I planned to do. I want to change the bandwidth of the module from 40 Hz to 20,000 Hz.
Then I'll try to create capacitive coupling electric field that vary from 1 to 20,000 Hz that can couple with body (no contact) and see the waveform of the modified EMG conform to the capacitive coupling frequency.
Then final test is by rapidly changing the capacitive coupling frequency, I can transmit music into the body and the circuit display it at the screen and maybe even playing back the music. Is this possible?
Also how do you create capacitive coupling transmitter circuit that vary from 0 to 20,000 Hz and couple it to the body non-contact? Has this been done before?