PCB
Open Source
MonkiiPad3x3 PCB
Nine keys, no handwiring. The easiest board we have drawn.
Specifications
| Layout | 9 keys (3×3 grid) |
| Build | Printed circuit board |
| Plate | 3D Printed (OnShape) |
| Controller | Pro Micro ATmega32U4 |
| Firmware | Arduino (same as handwired) |
| Connectivity | USB-C (via Pro Micro) |
| Status | Designed — not yet fabricated |
About This Design
The MonkiiPad3x3 is already our friendliest build, and this is the version with the wiring done for you. Nine switch footprints, a Pro Micro, and that is genuinely the whole schematic, which makes it a good first board to read if you have never opened KiCad before. We would suggest starting here rather than with one of the bigger layouts. Like the 39, it is designed but not yet fabricated, so the gallery below is CAD renders and the schematic rather than a soldered board.
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