4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers97 × 98 mm
MidiBoard
EmanuelKrabNL/MidiBoardWorking MIDI Keyboard using copper dedicated to my little sister so she can play piano!
- Size
- 97 × 98 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 15
- Nets
- 23
- Pads
- 76
- Tracks, vias
- 172, 7
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 21 Oct 2026
- Updated
- 25 Oct 2026
Overview
MidiBoard is an open-source printed circuit board by EmanuelKrabNL, from the EmanuelKrabNL/MidiBoard repository on GitHub. It is a 2-layer board of 97 × 98 mm with 15 parts on 23 nets, routed with 172 tracks and 7 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
What is this project?
Well, basically a simplified mini keyboard for my little sister. Shes saying she wants to play piano, so i built her one! (Hopefully she wanted to play the piano because her cool brother also plays drums and piano, rightttt..???) -# Im so funny i know right Okay, back to the plot, i made this becuase she wants a piano (just to press some keys and never touch it again), so we are making here one! (we are so back)
What does it do?
When you press the 'key looking things', while it is connected to a midi input supporting device, and the midi supporting device is actively running a midi supported application, and the firmware which makes the midi device input for the midi supporting device running the midi supported application is flashed, it should be ready to go! -# omg im so funny
Why is this suited for my little sister?
I have put the letters of the notes on the midi device which is supported by the midi- okay ill stop... ;-; Okay, so, the letters give my little sister an indication of what note she is playing, and i have also decided to make a higher note actually higher! That way she knows how high or low a note will sound like without thinking!
What can my midiboard do?
The left mechanical switch makes you go an octave lower, the right one makes you go an octave higher, and the middle one plays a random key!
The left slider 'does' the audio/volume, and the right one modulation!
Ive also added lights cause why not!
Why have i made this?
For my lil sis, duhhh...
What is its purpose?
insert musical sounds and off key piano notes being played by a grizzly bear
Parts
15| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | LOGO | LOGO | , G***, G***, G*** |
| 3 | SK6812MINI-E | LED_SMD:LED_SK6812MINI-E_3.2x2.8mm_P1.5mm_ReverseMount | D1, D2, D3 |
| 3 | SW_Push | Hackclub:Kailh Choc Low-Profile Switches | SW1, SW2, SW3 |
| 2 | R_Potentiometer_MountingPin | Potentiometer_THT:Potentiometer_Bourns_PTA1543_Single_Slide | RV1, RV2 |
| 1 | Capacisomething touch buttons | Hackclub:Capacitative keys | J1 |
| 1 | RotaryEncoder_Switch_MP | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW4 |
| 1 | Waveshare ESP32-S3-ZERO | Hackclub:Waveshare ESP32-S3-Zero | U1 |
Questions
How big is the MidiBoard PCB?
It measures 97 × 98 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MidiBoard use?
15 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 EmanuelKrabNL/MidiBoard repository on GitHub, at the commit this page was made from: the board is Production/Midiboard.kicad_pcb and its schematic Production/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 EmanuelKrabNL before reusing the design.
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