555 rock color light controller circuit

Published:2011/5/23 2:13:00 Author:TaoXi | Keyword: rock, color light, controller | From:SeekIC

As the figure 17-56 shows, the controller is composed of the step-down rectifier circuit, the 555 multivibrator, the color light control circuit, and it can be used to parallelly control the 220V，5W small power color lights or series rock control the 6-12V small light bulbs. The astable multivibrator is composed of the 555 and D3，D4，RP1，C2, by adjusting RP1, you can change the circuit's charging and discharging time constant to make the duty cycle of the alternating square wave to 2:1. When pin-3 outputs the low electrical level, the discharge tube of the substrate discharges, the pin-7 has the low electrical level, LED1 turns on, J1 closes, the first group of color lights turn on. Then this circuit goes round and round.



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