Lm317 0 12v Variable Power Supply Circuit Diagram

Battery charger circuits reverse polarity circuits variable power supply motor control circuits are designed using lm317 ic.

Lm317 0 12v variable power supply circuit diagram.

In the circuit with the components value makes the output voltage range of approximately 1 25 to 13 5 volts. How to use lm317 for producing a variable output. This ic is normally available in to 220 package and. We have 78xx 7805 7806 7812 etc series voltage regulators for positive power supply and 79xx for negative 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. It is a charge pump circuit used to create a low power negative dc voltage source. The picture above is the circuit diagram of the power supply. Second the output current up to 3a.

Third adjust the output voltage of 1 25v to 20v. They provide a fixed regulated power supply. Here we ll try to understand how to construct a simplest power supply circuit using the ic lm317. One of them is the extra pair of 470 uf capacitor and 1n4007 diodes below the main bridge rectifier.

Hence ac voltage regulator circuits can be designed. Now i have still used it. By using two lm317 ic s you can regulate both the positive and negative swings of a sinusoidal ac input. First it is a high quality power supply.

But what if need to vary the power supply voltage so here we have variable voltage regulator ic lm317. This below circuit is suitable for you with 5 important reasons. It is actually very similar to most of the lm317 based power supply with some key difference. Many years ago i built a first variable power supply using lm317.