three transistors used in the circuit and if you want to add another just simply connect it with IC pin7 and connect pin 10 to 15.
At the output of the IC2 we have marked some alphabets which shows the connection which should be connected with the same alphabets on the other side. The chasing speed of the circuit can be adjusted with the 100K resistor. The operating voltage of the circuit is 5V to 12V DC.
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The schematic given here is a project of an easy 30 LED chaser circuit. The circuit is easy to build and using only 3 ICs. The number of LEDs can also be increased by adding a transistor with each 10 LEDs and connecting the base of the transistor to the next output of the IC. For example if there are
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