Variable Regulated Power Supply Circuit Diagram

Adjustable power supply circuit.

Variable regulated power supply circuit diagram.

A variable dc power supply is one of the most useful tools on the electronics hobbyist s workbench. Transistor variable power supply 1a 0 30v. The 117vac or 220vac coming from the power cord is fed to the transformer tr1 via the on off switch and the 500ma fuse the 24vac output approximately from the transformer is presented to the bridge rectifier br1 and here rectified from ac alternating current to dc direct current if you don t want to spend the money for a bridge rectifier you can easily use four. Regulated power supply block diagram.

It s based on the lm317 that controls a few high power bipolar transistors connected in parallel to achieve a 0 30v voltage interval and a maximum current of 20amps. But it still has the same characteristics as a fixed regulated power supply. For this article i m going to show you my variable regulated power supply built from scratch the circuit diagram i ve used and a few safety tips. Variable power supply circuit from fixed voltage regulator.

Here is the circuit producing variable voltage power supply designed using fixed voltage regulators. This circuit is not an absolute novelty but it s simple reliable rugged and short proof featuring variable voltage up. Simply said it is a power supply that can adjust the output voltage or current. What is a variable power supply.