Circuit Project Electronic

Reverse engineered circuit diagram of a commercial LED fiber optic night light. The circuit board and LED’s are mounted inside a plastic case with ventilation holes. The light is particularly bright.
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When the circuit is first powered on LED’s D2 and D4 light just to indicate the circuit is operating. When the start button (SW2) is pressed all the LED’s turn off. They then illuminate sequentially at one second intervals until all five LED’s are on. After a random interval between 0 and about 7 seconds [...]

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 [...]