Variable Power Supply Using Lm317 Project Report Pdf

For example it is a power supply instead of a one 1 5v aa battery.

Variable power supply using lm317 project report pdf. The working of the circuit is as follows. This project uses a transformer to step down the incoming ac. It is a robust reliable and easy to use variable dc power supply. A regulated power supply is one that controls the output voltage or current to a specific value.

Here we ll try to understand how to construct a simplest power supply circuit using the ic lm317. This type of voltage regulators have output voltage in the range of 1 2 to 5 7volts and output current in the range of 0 1 to 1 5amperes. It has a capacity to develop a reference voltage of 1 25volts between the a adjustable terminal and output. The main parts required for the construction of the variable regulated power supply are listed below along with their specifications br1 bridge rectifier 100v 3a c1 1000 µf 63v ic1 lm317 adjustable regulator c2 0 1 µf v meter 30v ri 85 ohm c3 1µf.

Obviously you need something to supply electricity to your electronic projects. How to use lm317 for producing a variable output. Variable dc power supply is one of the projects that every electronics student should build. 0 12 v lm317 power supply.

A transformer is used to step down the ac supply to 24v at 2a. Fortunately it is easy to construct a stable power supply using negative feedback such. It is a simple variable dc power supply which gives 0 to 12 dc volts as an output. Here we use a simple full wave rectifier along with a voltage regulator which gives a constant output and its output can be increased by using a pair of voltage divider resistor in which one resistance is variable to get variable output.

This is the first dc power supply in my life that made to use in many projects. Instead of using batteries which have a limited lifetime a variable dc power supply can be used which is implemented in this project. With the advent of chips or ics like lm317 l200 lm338 lm723 configuring power supply circuits with variable voltage output with the above exceptional qualities has become very easy nowadays. This ic is normally available in to 220 package and.

Which is sufficient for normal use. A power supply whether it is a battery or a switched mode ac adapter is one of the most important tools in electronics. Building your own power supply is fun and using it throughout your constructional projects is the reward of your achievement. Variable dc power supply using lm317 variable dc power supply.

Lm317 is a three terminal adjustable voltage regulator. Variable power supply using lm317 1 2v to 30v at 1a. Regulated power supply circuit design using. Gec 329 swep report.