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If you want to build a LED Chaser circuit we suggest this circuit first. It uses popular IC is a simple and affordable IC-_decade counter and IC-.
As Figure1 is LED chaser circuit whicn The CD act as LED driver in output, by LED will glow only one in a rapid sequence. And control to speed with VR1 which is setting frequency output of a basic astable or free-running pulse generator with IC- as main.
The detail is other see in circuit picture better.
