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 ...

Here, a common cathode 7-segment LED display is connected to Arduino for displaying the digits. The code (Arduino sketch) allows push button increment of the counter from 0 to 9. The whole circuit can ...

“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 ...

By combining addressable LEDs, light pipes and 7-segment displays, ... Individual elements are lit by addressable LEDs, and the project can be built using an Arduino Nano or an ESP8266 for control.

He’s made several videos about the project, including the one below. Continue reading “Handheld Sudoku (Assuming You Have Large Hands)” → Posted in Arduino Hacks Tagged 7 segment leds ...