Pendant case for Waveshare RP2350-Matrix module
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Pendant-style case for Pi PIco2 module with RGB LED matrix
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- Printables
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- Electronics
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- Creative Commons — Attribution — Noncommercial
This is a case for Waveshare RP2350-Matrix module: https://www.waveshare.com/wiki/RP2350-Matrix
Module has builtin RGB LED matrix 8x8, and accelerometer+gyroscope combo. Which allows nice physics simulation projects to it, like water simulation.
Code has fluid simulator, as well as other faces in it. To switch between faces, double-tap the device on the face. To build a complete device, you'll need an appropriate size li-po pouch battery, and optional charge controller, as well as a tiny power switch.
I provide models for two versions:
Pro-Max - this one encloses RP2350-Matrix board with USB port, can carry bigger battery (I managed to squeeze in 400mAh), a charger module and a switch. I mounted the switch with hot glue, and desoldered the power diode form the board to allow charging via the main USB-C connector. If you won't desolder the diode, you can set your battery on fire with full USB current flowing directly into it. See the suggested wiring diagram in the github repo below.
Air - this is trimmed down version. To build it, I had to desolder the USB-C connector and a reset button. Then glued a PH JST 2mm connector (with pins, male) in place of the reset button. Also glued in the power switch, and wired a battery. The JST connector wired directly to the battery, so external charging module is required to charge this pendant configuration.
The firmware source with the build/flash instructions and wiring diagrams for both is available on github: https://github.com/poconoco/water-matrix
NOTE: I provide models, sources and wiring diagrams as is. If you do not understand the dangers of li-ion batteries and how to correctly handle and wire them - do not try to implement this project. You are doing it on your own risk.