Arduino Mega 7-Segment 4-Digit Counter (0000–9999)

Aug 17, 2025 · 2 min read · This project demonstrates how to interface a 4-digit 7-segment display with an Arduino Mega using bare-metal programming. The display counts from 0000 to 9999 using only 12 pins: 8 pins → for 7-segment data input 4 pins → for digit selection 🖼️ ...