Light switch circuit with luminous indication

Published:2011/4/19 6:42:00 Author:Nicole | Keyword: Light switch, luminous indication | From:SeekIC

The light switch circuit with luminous indication is as shown, when the switch S is turned on , 220V AC power supply is pressure released and current limited by resistance R, then it is added to the two sides of LED with bulb E, making LED conduction and lighting, it is convenient to find the switch at night. The current flows E is tiny, it is only about 2mA, this can be considered there is no power consumption, the light is off too. To close S, bulb E can work normally, but LED turns off. To open S, LED does not light, if the filament of bulb E is not burned out, then it must be power failure.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Control_Circuit/Light_switch_circuit_with_luminous_indication.html

Print this Page | Comments | Reading(3)