How to make 12v power supply easy at home

how to make 12v power supply easy at home using LM7812. easy steps with video and circuit diagram.

How to make 12v power supply easy at home

In this project we learn how to make 12v power supply easy at home using few simple steps with circuit diagram. for making this project we need some components.

Components:

  • LM7812 Voltage Regulator
  • Heat Sink
  • 50v 1000uf (Capacitor)
  • LED
  • 1K Resistor
  • 1N4007 (4 Diodes)
  • 12-0-12 (12v/1 Ampere Transformer)
  • PCB Board
  • Soldering Iron
  • Soldering Wire
In this project we use LM7812 voltage regulator. main function of voltage regulator is give us exactly 12v output.
We use diode bridge because its convert AC volt to DC volt.

12v power supply circuit diagram
12v power supply circuit diagram

Circuit Diagram:

  • Take 4 Diodes and make a bridge, like diagram.
  • Now connect transformer output with diode, like diagram.
  • Now connect 1000uf capacitor positive wire connect with positive wire and negative side connect with ground wire.
  • Now connect 1k resistor and LED with positive and negative wire.
  • Now voltage regulator 1st pin connect with positive wire 2nd pin connect with ground wire and 3rd pin use for output.
  • Voltage regulator 2nd (- 12v) and 3rd (+12) pin use for output power supply.
  • Finally connect Heat Sink with voltage regulator.
LM7812 pin out diagram
LM7812 Voltage Regulator

LM7812 Voltage Regulator Pin out:

LM7812 voltage regulator has 3 pin.
  • 1st Input
  • 2nd Ground
  • 3rd Output
main function of voltage regulator its provide exactly 12v output.
for example if input is 20v and i want exactly 12v output then i use LM7812.
Learn more with watching video

Video of how to make 12v Power Supply:


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