The system is controlled by an ESP32 running ESP-IDF and FreeRTOS.
The switches are handled by I2C port expanders. The LED strips are controlled by WS2812 chips.
<gallery widths="400px" heights="300px">
Datei:IMG_20230416_023446_267.jpg|Bottom side with port expanders and logos
Datei:IMG_20230416_023438_465.jpg|Top side with ESP32 and connectors for LEDs and Switches
</gallery>
I'm particularly proud of this because this PCB was a "first" in multiple ways
* It was my first PCB made with '''LibrePCB'''[https://librepcb.org/] (that actually works). If you want do create PCBs with an open source tool and found Eagle much more usable than KiCad, you should check it out.
* It's my first 4-layer PCB. 2 Layers would probably have been sufficient if I spent more time on optimizing the design. But I wanted to try out making a 4-layer PCB anyway.
* It's the first time I soldered TSSOP packages. They are a PITA if you are as motorically incompetent as I am.