4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers88.1 × 71.4 mm
Mini key capy
Az154za/Hackypady1Hackypady is a 9 key keyboard with one 0.91" OLED dispaly , 1 rotatory encoder , 3 multicolor LEDs (RGB) it does contain the XIAO seeed RP 2040 its objectif is to make u have fast access to ur favourite apps , shortcuts…
- Size
- 88.1 × 71.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 24
- Nets
- 26
- Pads
- 114
- Tracks, vias
- 167, 9
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 Dec 2025
- Updated
- 16 Dec 2025
Overview
Mini key capy is an open-source printed circuit board by Az154za, from the Az154za/Hackypady repository on GitHub. It is a 2-layer board of 88.1 × 71.4 mm with 24 parts on 26 nets, routed with 167 tracks and 9 vias.
It is built around the SK6812MINI-E. Its parts include 12 diodes, 10 switches, 1 IC and 1 connector. It belongs with the RP2040 boards of this library.
Main components
1README
README.mdHackypady
Hackypady is a 9 key keyboard with one 0.91" OLED dispaly , 1 rotatory encoder , 3 multicolor LEDs (RGB) it does contain the XIAO seeed RP 2040 its objectif is to make u have fast access to ur favourite apps , shortcuts ....
##PCB Here is my PCB with the schematic .it's made in Kicad .in This case I did the simple rotatory encoder because I have no pins digital pins
Assembly
- Mount the OLED and encoder where visible/easy to reach.
- Arrange the 9 switches in your preferred layout (3×3 grid is common).
- Wire the switches into a diode matrix (each switch in series with a diode) to allow scanning with fewer pins.
- Connect the encoder and OLED to the RP2040 according to the pinout you plan to use.
- Double-check power (3.3V) and ground connections before powering.
Firmware / Software
The firmware is made with KMK python to set up the initiation of buttons and the encoder up and down volume
About this project
This project is highly scalable and depends on what micro controller you want to use or what's ur idea
Bill of Materials
- 1 × Seeed XIAO RP2040 (or compatible RP2040 board)
- 1 × 0.91" OLED (I2C, 128×32 or 128×64)
- 1 × Rotary encoder switch or not ( it's an option)
- 9 × push buttons
- 9 × diodes (1N4148) for matrix design
Parts
24| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D4, D5, D6, D7, D8, D9, D10, D11, D12 |
| 9 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9 |
| 3 | SK6812MINI | LED_SMD:LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | D1, D2, D3 |
| 1 | OLED_128x32 | OLED1:SSD1306-0.91-OLED-4pin-128x32 (2) | J1 |
| 1 | RotaryEncoder | Rotateryencoder:RotaryEncoder_Alps_EC11E_Vertical_H20mm | SW10 |
| 1 | XIAO-RP2040-DIP | OPL:XIAO-RP2040-DIP | U1 |
Questions
How big is the Mini key capy PCB?
It measures 88.1 × 71.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Mini key capy use?
24 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 Mini key capy KiCad files?
From the Az154za/Hackypady repository on GitHub, at the commit this page was made from: the board is Hackypady/PCB design/Mini_key_capy.kicad_pcb and its schematic Hackypady/PCB design/Mini_key_capy.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mini key capy design in my own project?
Its repository states no licence, so its author keeps all rights: ask Az154za before reusing the design.
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