0 12v Variable Power Supply Circuit Diagram Using Lm317

The huge heat sink is required in this circuit as 2n3055 transistors produce a large amount of heat at full load.

0 12v variable power supply circuit diagram using lm317.

In the circuit with the components value makes the output voltage range of approximately 1 25 to 13 5 volts. This is also lm317 based variable power supply and low noise adjustable voltage output. 1 25v to 10vdc 0 12v from 12v battery source so simple circuit. Choose a simple first.

Hence ac voltage regulator circuits can be designed. This ic is normally available in to 220 package and. Besides this circuit we also have other interesting circuits. The lm317 will supply more than 1 amp of current to push the bases of the external power transistors and with an approximate gain of ten the combo ought to provide 15 amps or even more.

The lm317 regulator terminals are. In a normal circuit the general lm350 regulator has a start voltage of 1 25v. 0 28v 6 8a power supply circuit diagram using lm317 and 2n3055 this design can produce a current of 20 amps with little modification use proper rating transformer and a huge heat sink with fan. The lm317 is a 3 terminal positive voltage regulator with a 1 25 to 37 volts output voltage range.

Sample circuit of lm317 power supply others. Huge heat sink is required in this circuit as 2n3055 transistors produce large amount of heat at full load. Here we ll try to understand how to construct a simplest power supply circuit using the ic lm317. The lm317 constantly works using a voltage variation of 1 2 between the output and adjustment terminals and demands a minimal load of 10ma hence a 75 ohm.

The picture above is the circuit diagram of the power supply. But what if need to vary the power supply voltage so here we have variable voltage regulator ic lm317. This is a 0 12v variable power supply circuit at 3 amp. Lm317 variable voltage regulator circuit lm117 lm217 lm317 variable voltage regulator characteristics.

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. By using two lm317 ic s you can regulate both the positive and negative swings of a sinusoidal ac input. It is a charge pump circuit used to create a low power negative dc voltage source. We have 78xx 7805 7806 7812 etc series voltage regulators for positive power supply and 79xx for negative power supply.

It is actually very similar to most of the lm317 based power supply with some key difference. Lm317 adjustable voltage regulator 1 2v to 10v. Battery charger circuits reverse polarity circuits variable power supply motor control circuits are designed using lm317 ic. One of them is the extra pair of 470 uf capacitor and 1n4007 diodes below the main bridge rectifier.

In input out output adj adjust.