Hello everyone, is there any circuit I can find online that converts an audio signal into electrical stimulation? I want to build a mind machine device that combines visual, auditory, and electrical stimulation.

 

I found this device https://erostek.com/products/et232-power-unit

 

A microcontroller with a DAC (Arduino Due or ESP32) can process the audio signal and output a controlled waveform. It is possible to adjust frequencies, amplitudes, or pulse widths.

 

It is also possible to fry one's brains with an excessive voltage, if one uses the wrong circuit. Please understand that reality. Study some actual medical texts on the subject and ignore what you see on the cartoon channel. (YouTube)

 

You might enjoy this project:
https://forum.allaboutcircuits.com/threads/micro-current-electrical-stimulation-device.126578/