2 layers103 × 30.5 mm
2 layers100 × 66 mm
Chopsticks
wldd22/chopsticksA board with a screen and capacitive pads to play the common hand game, chopsticks, with a perfect algorithm! Originally made for Hackclub's Blueprint
- Size
- 100 × 66 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 9
- Nets
- 14
- Pads
- 39
- Tracks, vias
- 31, 2
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 27 Mar 2026
- Updated
- 7 Oct 2026
Overview
Chopsticks is an open-source printed circuit board by wldd22, from the wldd22/chopsticks repository on GitHub. It is a 2-layer board of 100 × 66 mm with 9 parts on 14 nets, routed with 31 tracks and 2 vias.
It belongs with the RP2040 boards of this library.
README
README.mdChopsticks
A board with a screen and capacitive pads to play the common hand game, chopsticks, with a perfect algorithm! Originally made for Hackclub's Blueprint
Details
PCB made using KiCAD
Firmware made with CircuitPython
About
There was no 3D modelling involved in this project, because I wanted the final outcome to be as minimal as possible. Just a flat PCB with a chip and a screen. I wanted to make a chopsticks AI for a few months, and after making the code for it, I wanted to make a piece of hardware that you could play it with.
Images
Schematic
PCB
BOM
Parts
9| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | TestPoint | Capacitive Pads:CAP_CIRCLE_PAD | TP1, TP2, TP3, TP4 |
| 3 | TestPoint | Capacitive Pads:CAP_RECT_PAD | TP5, TP6, TP7 |
| 1 | SSD1306 I2C OLED 128x32 | SSD1306 OLED:SSD1306 I2C OLED 128x32 | DS1 |
| 1 | XIAO-RP2040-DIP | Seeed Studio XIAO Series Library:XIAO-RP2040-DIP | U1 |
Questions
How big is the Chopsticks PCB?
It measures 100 × 66 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Chopsticks use?
9 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 Chopsticks KiCad files?
From the wldd22/chopsticks repository on GitHub, at the commit this page was made from: the board is pcb/chopsticks.kicad_pcb and its schematic pcb/chopsticks.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Chopsticks design in my own project?
Its repository states no licence, so its author keeps all rights: ask wldd22 before reusing the design.
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