Bedside lamp safety switch circuit (1)

Published:2011/7/1 3:27:00 Author:Ecco | Keyword: Bedside lamp , safety switch | From:SeekIC

This switch can be directly connected to the power cord of bedside lamp in series, which is easy to use. But after using for a long time, broken power lines will cause accidents, if it uses the safety switch shown as the chart, you can boldly use. Closing switch S, thyristor VT can get the trigger current and open by R1, R2 and S, then the controlled lamp E is lit by geting the normal full-wave alternating current; turning on the switch S, VT will lose the gate trigger current, then light is off as AC is zero crossing.



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