HOW TO MAKE A VARIABLE POWER SUPPLY ( VOLTAGE AND CURRENT CONTROL )

HOW TO MAKE A VARIABLE POWER SUPPLY In this video I have made a variable power supply using an adjustable voltage regulator LM 317 and a power transistor to increase its output current . I have tried to make this video as easy as it could be and used common components. I Hope it would be helpful COMPONENTS: 1- 1X LM 317 2- 1X D1047 TRANSISTOR 3- 1X BD139 TRANSISTOR 4- 1X 5 K OHM VERIABLE RESISTOR 5- 1X 10 K OHM VERIABLE RESISTOR 6- 1X 4.7 K OHM RESISTOR 7- 1X 4.7 OHM 10 WATT RESISTOR 8- 1X 220 OHM RESISTORS 9- 1X LED 10- 2X2 PIN TERMINAL BLOCKS 11- HEAT SINKS 12- 1X VERO BOARD 13- SOME WIRES Circuit diagram: https://drive.google.com/open?id=1e5s... https://drive.google.com/open?id=1lgJ... proteus file: https://drive.google.com/open?id=1WrS... Previous videos:    • HOW TO MAKE MOTION DETECTOR ALARM