Arduino 7 Segment Countdown Timer

Arduino 7 Segment Countdown Timer

This project is based on a Kingbright dual 7 segment display and an arduino Diecimila.it counts down from 20 and lights up pin 13 LED when the timer is complete.It uses no extra hardware which is usefull for low-cost projects. It also features multiplexing to get the job done with only 9 pins altogether for the displays.