Of course, there’s nothing unusual about using 7-segment displays, especially in a clock. However, [Edison Science Corner] didn’t buy displays. Instead, he fabricated them from a PCB us… ...

We’re used to seeing all manner of seven-segment displays, be they mechanical, electronic, or something in between. But what all these displays have in common is that they’re, you know,… ...

Each MAX7219 can control up to 64 individual LEDs or 8 seven-segment displays. By using these driver ICs, ... a digital clock made out of 144 seven-segment displays controlled by an Arduino Nano.