Voltage Regulator

Abstract:

In this project, a simple variable voltage regulator is implemented. LM317 is used to regulate the output voltage.

Circuit Diagram

reg317

Short Description

The output voltage of LM317 is adjustable as long as it maintains a difference between input voltage and output voltage lower than 40 Volts. 

Voltage reference is 1.25 (the band-gap voltage).

317formula

 Material list

Sr. No. Component Specifications Quantity
1 Transformer 230V/12V,300mA 1
2 Diodes 1N4007 4
3 Filter capacitor 1000mfd/25V 1
4 LM317 standard 1
5 Resistors 1k2,220 ohm,0.25W 1 each
6 Potentiometer 1k, 16mm 1
7 PCB General Purpose, 4″X4″ 1
8 Misc Wires, solder metal

This project is available in the kit form. Contact Omkar to buy it. This site has no commercial connection with his activities.