elektronika itu tanpa batas^^

This project provides an simple F1 motor racing style 5 light race start sequence with a random delay that you can use on a real race track, kart circuit or even your slot-car circuit. Operation is simple; when the start button is pressed all the LED clusters are off. They then illuminate sequentially at one second intervals until all five LED clusters are on. After a random interval between 1 and about 7 seconds the LEDs extinguish, signalling the start of the race. Once the LEDs have extinguished simply press the start button again to initiate another race start sequence.