20 Amp Variable Power Supply using LM317

20 Amp Variable Power Supply with an output voltage from 1.5 to 15 volts using the LM317 regulator and 4 2N3055 power transistors to amplify the current capacity

LM317 variable voltage regulator circuit diagram.

LM317 characteristics. How the voltage regulator circuit works, Regulator circuit operation improvement

Variable Dummy Load for Power Supply Testing.

How to test a voltage source to know if it is good or not?. What is the percentage regulation?.

Delayed activation 15V voltage source using LM317.

This circuit uses the LM317 voltage regulator. This voltage source also uses a bipolar PNP transistor and an electrolytic capacitor, to achieve a delayed activation of the voltage regulator