Light Dimmer Circuit Diagram. This simple 220v light dimmer circuit can be used to adjust the brightness of mains lights. Way to modify an ac dimmer into a light switch circuit to turn on off and automatic light dimmer or two in one form.
A rheostat or dimmer makes it possible to vary the current flowing to a light fixture thereby varying the intensity of the light. Turn on the light and have a helper watch as you switch off the circuit breakers or unscrew the fuses one at a time until the light goes out. Traveler wires are interchangeable on each switch.
Leave this circuit turned off while you work.
The capacitor c2 in the circuit below gets charge from the main supply. In the diagram below a 2 wire nm cable supplies power from the panel to the dimmer box. A 3 wire nm connects the travelers of the dimmer to the travelers of the 3 way switch. Turn on the light and have a helper watch as you switch off the circuit breakers or unscrew the fuses one at a time until the light goes out.
