SCR automatic delay light switch circuit diagram

Published:2011/8/1 1:54:00 Author:Ecco | Keyword: SCR , automatic delay , light switch | From:SeekIC

SCR automatic delay light switch Working principle is shown in Figure 39. The diode D1 ~ D6 make up bridge, the two contacts on one of the diagonalis connected to SCR1, andthe other two contacts on the diagonal leads are connecting to the original light switch. When K1 is closed, in a half week time of AC power, SCR1 turns on, so that the diagonal of the bridge short connected, so lights are bright; when K1 is open, the capacitor C1 discharges through R1, D1 to the SCR system-level, making the current of SCR system-level maintain. So light is turned on in the capacitor discharging delayedtime, then turned off. When peopleinstall this circuit, if pressing K1, lights off, you can re-select the resistance of resistor R1. The model of SCR and diode circuit determined by the size of the load current.



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