Basically in an electronic dimmer switch for incandescent lights, a triac forms the main part of the circuit and is responsible for the intensity control of the lights through phase control. Let’s learn more about its functional details and how to build it.
If you are really interested to make this dimmer switch circuit for incandescent lights, you better READ the FULL ARTICLE...
Thus only when the relay operates, the live wire is connected to the output through R/l contacts. The second pair of contacts R/ 2 is used in the neon circuit.
Both circuits are protected against overload or short-circuits.