Our project is composed of three main components:
The 1.) EMG amplifier, 2.) the Arduino, and 3.) the MIDI device.
- We'll build the EMG amplifier on a breadboard. If you're interested in a more in-depth look at the science behind the EMG amplifier and more detailed steps on how to build your own, check out my EMG audio amplifier Instructable.
- We'll power the Arduino from the same 9V batteries that power the EMG amp. Most of the work with the Arduino will be on the software side.
- I used an iPhone running Garageband as my MIDI device. The Arduino will send standard MIDI signals over a standard MIDI cable, so any MIDI device should work in place of the iPhone.
- (2x) LT1167 (instrumentation amplifier)
- (2x) LT1112 (or any dual op-amp chip)
- (1x) LM386N (audio amplifier)
- (5x) Surface EMG electrodes (two per muscle and one for a reference) (Amazon)
- Arduino Uno (Amazon)
- iPhone (or any MIDI device)
- MIDI to iPhone adapter cable (if using an iPhone) (Amazon)
- Various resistors, capacitors, and jumper wires
- Breadboard (Amazon)
- (2x) 9V battery
- Soldering iron (Amazon)
- Wire strippers
- Heat shrink tubing
- Electrical tape