- Cheap (about 10€)
- Compact (fits 250x250 Print beds)
- 4 Main buttons
- Fake Slide pad using buttons
- Enter/Escape Keys
The links lead to AliExpress
- 1x Raspberry Pi Pico (with USB-C)
- 8x Kailh Choc switches
- 10x WS2812B 5050SMD LEDs
- super glue
- 3D Printer
- Clear Filament and any other color you might want
- Soldering Iron
- Wires
- Protoboard/Perfboard for easier wiring (optional but highly recommended)
Choose between the press fit and the M3 threaded version and print all parts. The buttons don't require any (or only minimal) post-processing when printed with 0.1mm layers they are smooth enough as is. Print the buttons with low infill so that they stay lightweight and more transparent. I choose to give them all different infill patterns similar to their symbol.
I used the following settings:
Triangle with 15% triangle infill, rotate 45° so that the pattern aligns.
Square with 10% grid infill pattern, rotate the part 45° so that the pattern aligns.
Circle with 10% concentric infill pattern.
Cross with 10% Cross pattern
'ChocStem' needs to be printed 4 times and they are going to be glued to the main buttons.
'ChocBody' needs to be printed 6 times and they are used for all the buttons.
'ChocBodyShort' needs to be printed 2 times and they are placed underneath the slidebar.
The ChocBody parts should have a pretty tight fit so that they can be pressed in place but still removed later if needed. Might need some sanding to get them in or you could just glue them in.
I choose the following GPIO Pins
Triangle/W GP16
Square/A GP17
Cross/S: GP18
Circle/D: GP19
Enter: GP20
Escape: GP21
Slide Left/Q: GP4
Slide Right/E: GP5
However, you can wire these any way you want and then alter the assigned GPIO Pins starting from line 23 in the code.
The first 4 LEDs are Triangle, Square, Cross, and Circle in that order and light up along with button presses.
The last 6 LEDs should also be wired in series as in the picture, they have a RGB cycle and either side lights up respectively when pressed.
The Data In of the first LED has to be connected with GP0 after that, they are wired in series.
First, flash your Raspberry with the latest Circuit Python version available: https://circuitpython.org/board/raspberry_pi_pico/
Then drop the content of the Raspberry folder onto your Raspberry.
The 'lib' folder and 'code.py' should be in root.
After disconnecting and reconnecting your Raspberry, the board should light up after a few seconds
The code was entirely written by Google Gemini. I only changed some values for the LEDs