Here is a very simple circuit of a LED chaser using CD 4017 IC. 4017 is a CMOS decade counter IC. It is also called Counter or Divider. With the help of this chip you can easily build a nice LED chasing effects. This IC has 10 outputs to which we have connected 10 LEDs in the given circuit. The max




current on per output is 15mA, therefore do not use LEDs with current ratings more than 15mA. The circuit can be run with a 9 volt battery or power supply.
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LED Chaser Using 4017