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Modular RGB Matrix Digital Clock

A chainable, 3-D printable four-digit clock powered by an ATmega328P, addressable WS2812B LEDs and a PCF8523 RTC.

rmingonrmingon
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ws2812

This project was created on 07/29/2025 and last updated 5 months ago.

Description

I wanted a minimal wall clock that doubles as an RGB art-piece. Seven-segment displays felt too small, so I designed a custom PCB shaped like two stacked octagons, packed it with 24 WS2812B LEDs per digit, and wrapped everything in a snap-together, 3-D printed shell. The result is a bright, low-profile clock that can be chained into any number of digits.

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