4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers102.3 × 105.3 mm
MIDI Keyboard
shankarnoone-stack/MIDI-KeyboardI designed the schematic and PCB in KiCad, routed the traces, and exported the fabrication files. This is my Week 3 PCB project for Hack Club Half Life.
- Size
- 102.3 × 105.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 11
- Nets
- 23
- Pads
- 76
- Tracks, vias
- 170, 11
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 24 Oct 2026
- Updated
- 26 Oct 2026
Overview
MIDI Keyboard is an open-source printed circuit board by shankarnoone-stack, from the shankarnoone-stack/MIDI-Keyboard repository on GitHub. It is a 2-layer board of 102.3 × 105.3 mm with 11 parts on 23 nets, routed with 170 tracks and 11 vias.
It is built around the SK6812MINI-E. Its parts include 4 switches, 3 diodes, 1 IC and 1 connector. It belongs with the keyboards and input and audio and music boards and the ESP32 boards of this library.
Main components
1README
README.mdMIDI-Keyboard
MIDI Keyboard is a small piano-like PCB made with a Waveshare ESP32-S3-ZERO. It uses switches, touch sensors, a rotary encoder, LEDs, and a Bourns Potentiometer.
I designed the schematic and PCB in KiCad, routed the traces, and exported the fabrication files. This is my Week 3 PCB project for Hack Club Half Life.
What it is
MIDI is designed to be like a piano, with capacitive touch sensores, switches, and a rotary encoder. It responds to touch, and plays sound from the response.
How?
I started by following the guided MIDI Keypad project as this was really similar to my design. After, I set up the schematic with the Waveshare ESP32-S3-ZERO, the rotary encoder, switches, bourns potentiometers, and the touch keys. After this, I routed the traces, and checked it using designs rules checker to make sure that it was ok. I finally exported the fabrication files and created a BOM based on it.
Why?
I made it for the week 3 Half Life hackclub challenge, to learn about how to use KiCad and build a PCB and Schematic.
BOM.csv
I looked towards Aliexpress for my parts, and used JLCPCB for my PCB vendor. For my Bourns Potentiometers, I first thought of aliexpress, but then I realized it was only really found in Digikey.
| Part | What it is used for | Quantity | Price | Vendor |
|---|---|---|---|---|
| [Waveshare ESP32-S3-ZERO] | Main microcontroller | 1 | $1.46 | Aliexpress |
| [Rotary Encoder] | Knob on PCB | 1 | $1.52 | Amazon |
| [Bourns Potentiometers] | Sliders | 1 | $3.68 | Digikey |
| [SK6812 MINI-E] | LEDs for switches | 1 | $3.61 | Aliexpress |
| [Choc Switches] | Switches | 1 | $3.67 | Aliexpress |
| [PCB Fabrication] | Custom circuit board manufacturing | 1 | $8.61 | JLCPCB |
- Parts Subtotal: 22.55
- Tax & Shipping: $9.76
- Total Project Cost: $32.31
Repository contents
- KiCad source files and fabrication exports
- PCB and Schematic renders
- BOM
- Gerber files
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 | ESP32-S3-ZERO:Kailh Choc Low-Profile Switches | SW1, SW2, SW3 |
| 2 | Slider | Potentiometer_THT:Potentiometer_Bourns_PTA1543_Single_Slide | RV3, RV4 |
| 1 | Conn_01x07 | Keyboard Library:MIDI Keyboard | J1 |
| 1 | ESP32-S3-ZERO | ESP32-S3-ZERO:MODULE_ESP32-S3-ZERO | U2 |
| 1 | RotaryEncoder_Switch_MP | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW4 |
Questions
How big is the MIDI Keyboard PCB?
It measures 102.3 × 105.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the MIDI Keyboard 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 MIDI Keyboard KiCad files?
From the shankarnoone-stack/MIDI-Keyboard repository on GitHub, at the commit this page was made from: the board is Midi Keyboard.kicad_pcb and its schematic Midi Keyboard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the MIDI Keyboard design in my own project?
Its repository states no licence, so its author keeps all rights: ask shankarnoone-stack before reusing the design.
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