4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers98 × 76 mm
MIDIKeyboardProject
anvaymathur/MIDI-KeypadMIDI Keypad built for Half Life from HackClub
- Size
- 98 × 76 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 7
- Nets
- 21
- Pads
- 48
- Tracks, vias
- 75, 3
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 24 Oct 2026
- Updated
- 26 Oct 2026
Overview
MIDIKeyboardProject is an open-source printed circuit board by anvaymathur, from the anvaymathur/MIDI-Keypad repository on GitHub. It is a 2-layer board of 98 × 76 mm with 7 parts on 21 nets, routed with 75 tracks and 3 vias.
It is built around the SK6812MINI-E. Its parts include 3 diodes, 2 connectors, 1 IC and 1 switch. It belongs with the keyboards and input and audio and music boards and the ESP32 boards of this library.
Main components
1README
README.mdMIDI-Keypad
MIDI Keypad built for Half Life from HackClub. It is hackpad that uses copper touch pads that act as buttons for playing notes. A rotary encoder is used to control the octave of the notes. It can also act like a normal macropad if you chose to, just push down the encoder to switch modes. The encoder will then act as volume control and the copper touch pads will act like your macro keys.
Description
This was built following the guide provided by Half Life Hack Club for their music week project. It was a fun project to make to learn more about music in general because I have never done many music related things before so learning how MIDI works and how to use it to create music was fun. I added the macropad feature to make it more functional for me as I do not often create music.
Features
- Custom PCB
- Neopixel Lights for mode status and while playing notes
- OLED Screen for displaying information
- Copper Touch Pads formed in the shape of a hand to act like ergonomic keys
- EC11 Rotary Encoder for octave control
- Switch modes to use as a generic macropad
PCB
Custom PCB Made in KiCad. Some footprints and schematics were from Kai Pereira's Hackclub-KiCad-Libraries
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Firmware
There is custom firmware written in CircuitPython for controlling all of the components, currently does not include code for different modes, only for the main music mode.
BOM
Parts
7| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | SK6812MINI-E | LED_SMD:LED_SK6812MINI-E_3.2x2.8mm_P1.5mm_ReverseMount | D1, D2, D3 |
| 1 | Conn_01x04_Socket | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J2 |
| 1 | Conn_01x07 | MyLibrary:HandTouch_7 | J1 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW1 |
| 1 | Waveshare ESP32-S3-ZERO | Hackclub Footprints:Waveshare ESP32-S3-Zero | U1 |
Questions
How big is the MIDIKeyboardProject PCB?
It measures 98 × 76 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MIDIKeyboardProject use?
7 parts, built around the SK6812MINI-E. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the MIDIKeyboardProject KiCad files?
From the anvaymathur/MIDI-Keypad repository on GitHub, at the commit this page was made from: the board is KiCad/MIDIKeyboardProject.kicad_pcb and its schematic KiCad/MIDIKeyboardProject.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MIDIKeyboardProject design in my own project?
Its repository states no licence, so its author keeps all rights: ask anvaymathur before reusing the design.
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