Today Im going to give you a wonderful circuit diagram.Most of you ask about police car light systems.So I thought to give you a police car light system circuit diagram.Here I have used two ICs one is IN4017 and the other one is 40106.Here I have used only blue colour LEDs If you like to add any other colour you can add them.I think after adding this circuit for your car you can attract others.

# Build this circuit on a P.C.B
# Dont use more than 6V
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Note
# Dont use more than 6V