81 LED chaser using double IC 4017
Parts list:
IC555
IC4017(2pcs)
2N3904 or any other NPN(9pcs)
10k resistor(10pcs)
470 ohm resistor
3.3k resistor
LED(81pcs)
Capacitor 1uF 10v
100k potentiometer
Diode 1N4007
1.5v AA battery(4pcs)
Battery holder
Prototype Breadboard
Video:
