2 layers18.5 × 11.1 mm
Switch
byrantech/laptop
anyon_e, a highly integrated, high end, open source laptop. Attempt the impossible.
6 parts4.3kMIT
2 layers57.5 × 41.5 mm
Padderwadder
rantles/PadderwadderA 3-key macropad with an OLED Display and Encoder that uses QMK
- Size
- 57.5 × 41.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 6
- Nets
- 14
- Pads
- 40
- Tracks, vias
- 56, 0
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 4 Oct 2026
- Updated
- 6 Nov 2026
Overview
Padderwadder is an open-source printed circuit board by rantles, from the rantles/Padderwadder repository on GitHub, published under the MIT licence. It is a 2-layer board of 57.5 × 41.5 mm with 6 parts on 14 nets, routed with 56 tracks and 0 vias.
Its parts include 4 switches, 1 IC and 1 connector. It belongs with the keyboards and input and lEDs and displays boards of this library.
README
README.mdPadderwadder
Padderwadder is a simple 3-key macropad featuring an OLED Display and a rotary encoder! I programmed this macropad for the game osu! using QMK Firmware. This is my first ever hardware project, so I got to learn how to use a ton of new programs throughout the process :D
Features
- 3 keys
- A 0.91 inch OLED Display
- EC11 Rotary encoder
- A 3D printed case
- QMK Firmware
CAD
Heres my CAD model, made in Fusion 360! The case is held together by 4 M3 Bolts and heatset inserts. I think I spent almost half of my time researching and figuring things out but I had fun :)
| Top | Middle | Middle |
|---|---|---|
 |  |  |
PCB
My PCB, made in KiCad 10.0
Schematic:
PCB:
Firmware Overview
This entire macropad uses QMK Firmware.
The rotary encoder is programmed to rotate to change volume, and press to mute.
BOM
Everything needed for this design:
- 1 unsoldered Seeed XIAO RP2040
- 3x MX-Style switches
- 4x White blank DSA Keycaps
- 1x 0.91 inch 128x32 OLED display
- 1x EC11 Rotary Encoder
- 4x M3x16mm screws
- 4x M3x5mx4mm heatset inserts
- 3D printed case
Parts
6| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW3, SW4, SW5 |
| 1 | MOUDLE-SEEEDUINO-XIAO | footprints:XIAO-Generic-Hybrid-14P-2.54-21X17.8MM | U1 |
| 1 | OLED_128x32 | ScottoKeebs_Components:OLED_128x32 | J1 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW1 |
Questions
How big is the Padderwadder PCB?
It measures 57.5 × 41.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Padderwadder use?
6 parts. 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 Padderwadder KiCad files?
From the rantles/Padderwadder repository on GitHub, at the commit this page was made from: the board is PCB/Padderwadder.kicad_pcb and its schematic PCB/Padderwadder.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Padderwadder design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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