555 Reaction Timer Game This is a basic reaction game using the 555 timer IC. The circuit waits for a short delay, lights up an LED, and checks how fast you press the button after the LED turns on.

LED chaser lights (or) sequential LED flasher circuit on a breadboard using 555 timer + 4017 IC and a few other components. The LED’s chasing rate can be adjusted using a potentiometer in place of 47K ...