LED Chaser.

A LED chaser using a CMOS 4017 and a 555. (5/28/2006)


I guess you remember the car "K.I.T.T." and the lights at the front of it. The light effect is quite interesting. After I learned digital electronics, I built this circuit to simulate the led chaser of that car.


LED chaser 4017B 4017 NE555


The 555 oscillator can be replaced with any other kind of oscillator and it may work with 3 volts. The diodes can be 1N4148 or any other silicon diode, these diodes are used as "OR" gates for some outputs from the 4017.


By the way, In some places is illegal to use this kind of lights.


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