Reddit user Krukerfluk has created an awesome DIY digital clock using 144 x seven segment ... Arduino Nano, a compact and versatile microcontroller board that is perfect for DIY electronics projects.

What do you do with 144 7-segment displays ... This presented a problem, as [Frugha] wanted to control the clock with a single Arduino Nano. Even charlieplexing won’t get you that many I ...

[Lewis] has just the thing for that: a big expandable 7-segment display ... are lit by addressable LEDs, and the project can be built using an Arduino Nano or an ESP8266 for control.