There are a lot of electrical devices that only have two settings: ON and OFF. For a many of these, it would be helpful if you could adjust the output with an external circuit.
So in this project, I am going to show you how to make an adjustable power outlet. This circuit acts as an external dimmer and can be used to adjust the power on a variety of appliances such as Lamps, heaters, soldering irons, and hot glue guns.
The circuit used in this project is designed for simple resistive loads such as heating elements and lights. It is not suitable for inductive loads such as motors or fans. These generally require a different kind of control circuit. Also it should not be used with devices that use AC power adapters or devices that have their own built-in control circuits. These may not function properly when connected to a dimmer.