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 ...

BCD Counter with 7447 IC Uses a 7490 Decade Counter connected to a 7447 BCD to 7-segment driver. Displays numbers 0–9 on a common anode 7-segment display. Arduino-Based Digital Counter Programmed in ...

Common Cathode and Common Anode: There are two main types of 7-segment displays: common cathode (where all cathodes are connected) and common anode (where all anodes are connected). Arduino ...