Variable Power Supply Using Lm317 Project Report Pdf

Instead of using batteries which have a limited lifetime a variable dc power supply can be used which is implemented in this project.

Variable power supply using lm317 project report pdf.

For example it is a power supply instead of a one 1 5v aa battery. The working of the circuit is as follows. A regulated power supply is one that controls the output voltage or current to a specific value. A transformer is used to step down the ac supply to 24v at 2a.

Variable dc power supply is one of the projects that every electronics student should build. 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. How to use lm317 for producing a variable output. It is a simple variable dc power supply which gives 0 to 12 dc volts as an output.

Here we ll try to understand how to construct a simplest power supply circuit using the ic lm317. 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. The controlled value is held nearly constant despite variations in either load current or the voltage supplied by the power supply s energy source. It has a capacity to develop a reference voltage of 1 25volts between the a adjustable terminal and output.

Making your own power supply is also one of th. 0 12 v lm317 power supply. Regulated power supply circuit design using. Which is sufficient for normal use.

This ic is normally available in to 220 package and. Lm317 is a three terminal adjustable voltage regulator. This is the first dc power supply in my life that made to use in many projects. It is ideal for those who want to adjust voltage from 1 25v to 30v and currents up to 1a.

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. Obviously you need something to supply electricity to your electronic projects. It is a robust reliable and easy to use variable dc power supply. Variable dc power supply using lm317 variable dc power supply.

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. A power supply whether it is a battery or a switched mode ac adapter is one of the most important tools in electronics. Fortunately it is easy to construct a stable power supply using negative feedback such. Variable power supply using lm317 1 2v to 30v at 1a.