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Light switch with light indication circuit

light switch with light indication circuit
with LED indication light switch circuit as shown, when the switch S is turned on, 220V AC buck by limiting resistor R E and the light bulb light-emitting diode LED is increased to two side to make the LED power light. So at night to find switches. Little current flows through the E now, only about 2mA can be deemed not to consume electricity, lights do not light up. Close the S, E be the normal light bulb, LED goes out at this time. If the open S, LED does not light, if not blown light bulb filament E, that is a power outage.

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Light switch with light indication circuit