555 automatic circulating seven colors color-light control circuit

Published:2011/5/22 19:55:00 Author:TaoXi | Keyword: automatic circulating, seven colors, color-light, control circuit | From:SeekIC

This color-light circuit uses the three-color light bulb which is controlled by the frequency divider, it has eight kinds of combination luminous states, it is colorful and unpredictable. So this circuit can be used in wide range of applications such as the advertising lights, the holiday lights and the decorative lights. This circuit is composed of the low frequency oscillator, the frequency divider, the trigger control circuit and the step-down rectifier circuit.etc. As the figure 17-58 shows. The step-down rectifier circuit is composed of the step-down transformer T, the bridge rectifier and the filter capacitor C4. The no steady-state low-frequency oscillator is composed of the IC1(555) and R1，R2，C1, the oscillation frequency fc=1.44/(R1+2R2)C1.



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