Schematic Circuits ==>

Simple 10 Led Chaser With Cd4017

This is the schematic for a very basic 10 LED chaser,

The 10K pot can reduce the flash speed from not moving to whatever minimum time constant is possible with the C1 value you choose. Don´t bother with ultra-bright LEDs for these "chaser" projects as cheaper, lower millicandela (mcd) LEDS work fine.

The 4017 decade counter is a fabulous part and can be driven to flash a row of LEDs with a 555 timer chip or a discrete BJT multivibrator.

Led Chaser 4017 1.GIF F9F33.gif

This circuit from "qrp.pops.net",please goto http://www.qrp.pops.net/LEDs.asp   for more

Keywords : Led, Chaser, With, Cd4017, 555, Ne555
Writer : delon  |
2 Feb 2011 Wed   
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