Variable Dc Power Supply Circuit Diagram

The circuit of a universal power supply described here complete with schematic diagram and parts list fulfills all the above criteria and more importantly the construction costs hardly anything.

Variable dc power supply circuit diagram.

When the current exceeded tr1 and tr2 will work. Dc power supply schematic diagram. Above are the parts needed to create a dc power supply. Continuously variable short circuit and overload protected hum free stabilized output.

For smaller voltages we normally use batteries as a reliable source. 1 25v dc continuously variable 0 2amps. 0 30v variable power supply at 3a two resistors r1 and r2 limit the overload current. A power supply can be given from the battery or from a hardware circuitry which converts the ac supply into the dc supply or step down ac to step up ac and vice versa.

A lm317 is a versatile device which helps an electronic hobbyist to build a variable voltage power supply quickly cheaply and very efficiently. And there are ic1 is used to control a voltage at out point by adjusting vr1 can adjust voltage between 0 50 volts. A variable power supply is one which facilitates the user to vary and adjust the desired output voltage and output current. As the name suggests a variable power supply circuit provides the user with a range of linearly varying output voltages through a manually controlled potentiometer rotation.

A variable dc power supply is very important for electronics projects prototyping and hobbyists. Instead of using batteries which have a limited lifetime a variable dc power supply can be used which is implemented in this project. They work together with two transistors tr1 tr2.