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led light running arrows showing the position circuit and explanation



This
is a led light running circuit with a number generated from IC
CD4093, CD4520 and CD4094.This circuit can adjust the speed with
resistors R1.When entering the power supply to the circuit IC1. A nand
gate IC Oscillator generator circuit is connected to the input signal
generator to pin 1 of IC2 and pin 3 of the IC3.When receiving the
signal from IC1 IC2 will serve up the signal from the logic into the
binary.Then sent to the pin 5 and pin 6 of IC1, IC1, which will process
a nand gate.The IC3 is the signal from IC1 to processing and export
of pin 4, 5, 6 and 7.Then entered into the base of the transistor pins
Q1-Q4.Any work on the transistor connected to the LED pin collector
will glow out come.For the format of the 17 LED Lights, arranged as a
form of directional arrows.
source: www.eleccircuit.com