OpenChess - Plastic PCB

Build guide: https://joojoooo.github.io/OpenChess/ The original PCB is difficult to source and has several design flaws:Connects the 74HC595 pin 13 OE' to 5V, disabling itEven if you fix OE', it often still WON'T WORK with 3.3V input signals! You need a level-shifter or the HCT versionThe HE sensors draw more current from the shift-register than it is rated forDamages your 3.3V MCU by wiring GPIO input pins to 5V sensor outputsSo I decided to build my own without a PCB: I bought all the required components individually from AliExpress for around 20€ and designed a “plastic PCB” to keep everything in place. The board was also re-designed from the ground up, improving on the original in several key ways:💡 Consistent brightness and color Each white square now has a dark backing and each dark square has a white backing, ensuring even, same color illumination. The ring is -0.4mm less thick, which makes it more bright and visible in a well lit room. A black mask blocks all light