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 ...

A low pulse on this pin (below 1/3 of VCC) sets the internal flip-flop and makes the output go HIGH. When the voltage on this pin reaches 2/3 of VCC, it resets the flip-flop, and the output goes LOW.

This circuit creates a sequential flashing animation of 10 LEDs which is operated by the CD1017 and 555 integrated circuits. It requires a VCC and GND from a 9V battery and allows you to monitor the ...