4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers100 × 85 mm
MidiBoard
lima6-tech/MidiBoardA custom midi PCB with touch capacity keys, switches, LEDs and more!
- Size
- 100 × 85 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 11
- Nets
- 23
- Pads
- 73
- Tracks, vias
- 177, 3
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 22 Oct 2026
- Updated
- 23 Oct 2026
Overview
MidiBoard is an open-source printed circuit board by lima6-tech, from the lima6-tech/MidiBoard repository on GitHub. It is a 2-layer board of 100 × 85 mm with 11 parts on 23 nets, routed with 177 tracks and 3 vias.
It is built around the SK6812MINI-E. Its parts include 4 switches, 3 diodes, 1 IC and 1 connector. It belongs with the ESP32 boards of this library.
Main components
1README
README.mdMidiBoard
A custom midi board PCB. Features hexagon shaped touch capacity keys, switches with LEDs and rotary encoders + potentiometer sliders.
Components
| Component | Quantity |
|---|---|
| LED SK6812MINI-E | 3 |
| Capacity Keys (Capacitive keys) | 1 |
| Potentiometer Bourn Single_Slide | 2 |
| Cherry MX Switches | 3 |
| RotaryEncoder Alps EC11E-Switch Vertical H20mm | 1 |
| Waveshare ESP32-S3-Zero | 1 |
Firmware
Done with Circuit python. The capacity keys play notes (A-G). The different midi board components have been set to do different note adjustment functions (controlling midi cc values). I might later change the middle (2nd) key to change key layers.
| Component | Function |
|---|---|
| Left switch | Raises the notes played by an octave |
| Center switch | pause / play |
| Right switch | Lowers the notes played by an octave |
| Rotary Encoder | controls volume |
| Slider 1 | note modulation |
| Slider | note resonance |
Parts
11| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | SK6812MINI-E | LED_SMD:LED_SK6812MINI-E_3.2x2.8mm_P1.5mm_ReverseMount | D1, D2, D3 |
| 3 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3 |
| 2 | Potentiometer_Slider | Potentiometer_THT:Potentiometer_Bourns_PTA2043_Single_Slide | RV1, RV2 |
| 1 | Capacitive_keys | CustomLibrary:CapacityKeys | J1 |
| 1 | RotaryEncoder_Switch_MP | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW4 |
| 1 | Waveshare ESP32-S3-ZERO | Hackclub Footprints:Waveshare ESP32-S3-Zero | U1 |
Questions
How big is the MidiBoard PCB?
It measures 100 × 85 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MidiBoard use?
11 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 MidiBoard KiCad files?
From the lima6-tech/MidiBoard repository on GitHub, at the commit this page was made from: the board is PCB/Midiboard.kicad_pcb and its schematic PCB/Midiboard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MidiBoard design in my own project?
Its repository states no licence, so its author keeps all rights: ask lima6-tech before reusing the design.
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