4017 Ic 555 Circuit. A 555 timer is set up in astable mode which makes it into an oscillator circuit that creates clock signal. You can build simple led chaser circuits using cd4017 and ne555 timer.
555 timer based police lights circuit principle. The ic 4017 is decade counter with 10 decoded outputs ic ic. Whenever there is a low to high transition on the clock signal i e on the rising edge the output of the counter is incremented by 1.
And has the sound effect generator with adjusting tone music with a tempo slow fast as you want it to vr11.
Circuit diagram of 2 way 12 led running lights using cd4017 and ne555. Here the 555 timer runs in astable mode. This energizes the relay and both the contacts move upward and connect with the positive supply. The circuit utilizes a dpdt relay having two sets of contacts.
