Color-Shifting LED Show circuit

Published:2013/3/29 4:38:00 Author:Ecco | Keyword: Color-Shifting LED Show | From:SeekIC

This circuit gives a changing-color LED display, where a LED will emit a dynamic shifting color, from red to green smoothly through yellow. The circuit uses NE556 dual timer, equal to two 555 IC but in only one package. The oscillators is set at different frequencies. The high frequency (upper part) is used to construct a PWM signal, and the lower frequency oscillator is used to control the shifting frequency. What is done by the low frequency oscillator is no more than modulating the duty cycle (active factor) of the PWM.



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