Here is a simple, yet useful circuit of an Arduino 4-digit 7-segment LED display unit. The module used here is a self-contained, compact common-cathode module containing four 7-segment LED numeric ...

With 4*7+2 = 30 units you can make a 4-digit 7-segment clock. Report ... these wasn’t the 48 Arduino thing but my 840 segment display, with which this seems to share some of the code : ...

“I’ve built a digital clock made out of 144 seven-segment displays controlled by an Arduino Nano. The segments are controlled by 18 MAX7219 ICs which can control up to 64 individual LEDs or 8 ...

The panels are arranged in a 7-segment display format, commonly used in digital clocks and calculators. Each digit is represented by seven segments that can be individually controlled to form numbers.