Refrigerator working indicator light principle circuit diagram

Installing a working indicator light on the power socket of the refrigerator not only makes it easier to observe the start and stop of the refrigerator, but also increases the aesthetics of the socket.

The circuit is shown in the figure. The induced current on the secondary side of the current transformer is used to light up the light-emitting diode. For the current transformer, you can find a slightly larger transistor radio input or output transformer and modify it according to the data shown in the figure. Pay attention to the insulation between windings. The current limiting resistor R can be selected from a few ohms to dozens of ohms.