This post presents circuit of electronic coin toss also known as coin flip circuit or heads or tails circuit. When the push-button is pressed, the LEDs will start blinking fast. One of the LEDs will stay to light up when the push-button is released. Circuit is based on 555 timer that works in astable mode to generate the output in the form of a square wave.
Use two different colored LEDs. For example, the red LED for heads and the green LED for tails.
|1.||Power supply (9V)||1|
|6.||1μF electrolytic capacitor||1|
|7.||10nF ceramic capacitor||1|
|9.||Momentary push-button switch||1|
The blinking rate of the LEDs depends on the values of R1, R2 resistors, and C1 capacitor.
Circuit is designed on a breadboard.