[Barzok] has a very minimal clock build. It takes a handful of LED arrays with an integrated driver, an Arduino Nano, a real-time clock module, and a voltage regulator.

The hardware is what you’d expect to see: Arduino Nano, a DS1307 RTC, plus the LEDs and resistors. We think an RGB LED would be a nice way to mix up the standard stoplight hues a bit.

Check out this smart shelving system driven by an Arduino and using LEDs, which serves as a clock.

1. Arduino Nano Microcontroller: This small yet powerful microcontroller will be the brain of your clock, handling all the logic and control for the LEDs. 2.

Check out the video below to learn more about the Arduino Word clock powered by an Arduino Nano along with a RTC module.