The light control safety switch

Published:2011/7/22 7:11:00 Author:qqtang | Keyword: light control, safety switch | From:SeekIC

The working principle of the circuitThe light control safety switch circuit consists of the power supply circuit, light control circuit and control executing circuit(switch circuit), see as figure 8-128. The power supply circuit consists of the power supply circuit T, rectifier bridge pile UR and filter capacitor C2.The light control circuit consists of the LDR RL, resistor Rl-R3, potentiometer RP, transistor V1 and capacitor C1.The control executing circuit consists of the diodes of VD1 and VD2, transistors V2 and V3, relay K and so on.



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