Overview

This is a 6-channel opensource MIDI drum module using an ESP32 or Teensy micro-controller.

This module uses the excellent Edrumulus software to analyze the incoming signals and forwards it to a host machine (like a Raspberry Pi or desktop computer) over USB serial, where it's converted to MIDI so it can be processed in a DAW (like Ableton, Logic, Cubase etc), using a drum VST like Addictive Drums or Superior Drummer.

Tested with the following pads:

DAW: Ableton 11 (Windows 10)

Bill of materials

For 6 channels, you'll need the following hardware:

• 1 x Rocker switch (5v+)
• 1 x Micro-USB extension cable
• 1 x ESP32 (or Teensy 4.x) micro-controller
• 3 x 5 by 7 cm PCB
• 1 x LED
• 6 x 1/4 stereo jack female PCB mount (3 pins)
• 14 x BAT85 diode
• 14 x 22k Ohm resistor
• 7 x 100k Ohm resistor
• 2 x 10k Ohm resistor
• 12 x M2.5 12mm screw + nut
• 4 x M3 25mm screw
• 4 x M3 10mm screw
• 6 x M3 nut
• 4 x M3 threaded insert

More info

The schematics for the drum module can be found here: [https://github.com/corrados/edrumulus/blob/main/hardware/prototype2/edrumulus.pdf](https://github.com/corrados/edrumulus/blob/main/hardware/prototype2/edrumulus.pdf)

Any questions about edrumulus should be asked in the discussion forum: [https://github.com/corrados/edrumulus/discussions](https://github.com/corrados/edrumulus/discussions)

Happy drummin!