This circuit is an LED Chaser with 81 LEDs using two 4017 ICs and 555 timer
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You can download the Gerber file of this PCB from here:
Circuit diagram:
Parts list:
IC1 & IC3= IC 4017(2pcs)
IC2= IC 555
5mm LEDs (81 pcs)
T1 to T9= 2N2222 transistor(9pcs)
C1= 2.2uF capacitor
P1= 100K potentiometer
D1= 1N4007 diode
R1 to R9= 1K resistor(9pcs)
R10= 470 ohm resistor
R11= 10K resistor
R12= 3.3K resistor
IC2= IC 555
5mm LEDs (81 pcs)
T1 to T9= 2N2222 transistor(9pcs)
C1= 2.2uF capacitor
P1= 100K potentiometer
D1= 1N4007 diode
R1 to R9= 1K resistor(9pcs)
R10= 470 ohm resistor
R11= 10K resistor
R12= 3.3K resistor
Watch the Video:
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