0 30v Variable Power Supply Circuit Diagram Using Lm317

This circuit is better than the above circuit.

0 30v variable power supply circuit diagram using lm317. 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. 1 2v 20v 3v 6v 9v 12v high current for all circuit easy to use. Please look at. 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 a fan.

Best adjustable dc power supply 3a. 0 50v 3a variable power supply 0 30v 0 5a variable supply with current adjustable. The huge heat sink is required in this circuit as 2n3055 transistors produce a large amount of heat at full load. The components layout of regulator 0 30v 5a using lm723 2n3055.

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 does not has a reference voltage for 723 and not fully overload protection. There positive and negative voltage outputs. Although you could use this design to deliver 20 amps with almost no modifications and with a proper transformer and a huge heat sink with a fan.

In this video i m making a simple but very useful power supply to power up your electronic equipment under the current rate of 500ma and 3 15v dc voltage ran. How to use lm317 for producing a variable output. This ic is normally available in to 220 package and. By using two lm317 ic s you can regulate both the positive and negative swings of a sinusoidal ac input.

Huge heat sink is required in this circuit as 2n3055 transistors produce large amount of heat at full load. This is an easy to make power supply which has stable clean and regulator 0 28v 6 8 amp output voltage. Dual power supply 3v 5v 6v 9v 12 15v using lm317 lm337. It s high volt and starts voltage at zero.

Hence ac voltage regulator circuits can be designed. But what if need to vary the power supply voltage so here we have variable voltage regulator ic lm317. By using two 2n3055 transistors we become more then 2 times the amount of amps then the power supply delivers making it real though to brake. Battery charger circuits reverse polarity circuits variable power supply motor control circuits are designed using lm317 ic.

Here we ll try to understand how to construct a simplest power supply circuit using the ic lm317. They provide a fixed regulated power supply. 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. We have 78xx 7805 7806 7812 etc series voltage regulators for positive power supply and 79xx for negative power supply.