Variable Dc Power Supply Circuit Diagram

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.

Variable dc power supply circuit diagram.

A variable dc power supply is very important for electronics projects prototyping and hobbyists. For smaller voltages we normally use batteries as a reliable source. 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.

We ll now go over each part of this circuit and go over the role each component plays so that you can know how this circuit works. Instead of using batteries which have a limited lifetime a variable dc power supply can be used which is implemented in this project. 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. Below is the schematic for the dc power supply so that we can see how all the parts are connected and are brought together.

They work together with two transistors tr1 tr2. 0 30v variable power supply at 3a two resistors r1 and r2 limit the overload current. 0 50v 3a variable power supply circuit. 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.

Continuously variable short circuit and overload protected hum free stabilized output. 1 25v dc continuously variable 0 2amps. Above are the parts needed to create a dc power supply.