The light control electric switch circuit

Published:2011/7/7 20:32:00 Author:Seven | Keyword: light control, electric switch | From:SeekIC

The ON and OFF of the light control electric switch is completed by the conduction or block of SCR, and SCR is under control of the brightness of the natural light (or man-made light). This device is fit for the street, the dorm corridor and other public places, which can make lamps light at daytime and put out at night, so the power is saved. Working principle: see as the figure, the 220V AC is past the bulb and rectified in full bridge, after that, it becomes a DC impulse voltage as the forward bias voltage.



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