Project Linear Power Supply

Transformer have 2 coils which are in mutual induction with each other.

Project linear power supply. Variable 2 to 25v dc supply. So the main purpose of a power supply is to change 220v ac to 5v dc. In the 1990s i was asked to design and build a power supply to provide a variable voltage dc power supply that would provide variable voltages at currents of up to 5 amps for experiments in a solid state physics lab at northumbria university. The built in transformer has a much higher power reserve compared to the standard power adapter.

The average linear regulated device achieves an efficiency between 30 60 due to heat dissipation. Over the years probably 1000 went through the system and maybe 250 started their own projects mainly audio amplifiers but some power supplies. Linear regulated power supplies only provide one output voltage. Stepping down 220v ac to 9v ac.

I think out of all those starters there was only about five audio amps completed and they were texan kits and no power supplies to speak off. It will include 4 steps step 1. Let s learn how to make a linear power supply step by step. Before heading in to the making process you should know the basic components of a linear power supply.

A linear power supply consists of a massive toroidal transformer with shielding between primary and secondary winding which acts as an isolating transformer and avoids penetration of interferences from mains into the audio component. First of all let s clear our aim. It is used to step down the voltage this also serves to isolate the power supply from the mains input for safety. If you need more then you ll need to add a separate linear voltage regulator per required output.

The transformer changes the ac mains voltage to a desired value. The linear power supply used in the power box rs consists of a massive toroidal transformer with shielding between primary and secondary winding which acts as an isolating transformer and avoids penetration of interferences from mains into the audio component. John errington s tutorial on power supply design how to design and build a linear dc power supply background. The main elements of the linear power supply are.

As i said in step one this was my first time doing something like this a pcb this was a project for 1 of the courses at my college called linear electronics i just wanted to do it as big as possible i am currently designing a 45 amper switching power supply and yes they are more efficient but they have problems with harmonics and. Upgrade audiophile linear power supply for pro ject tube box ds ds2 18v dc cas 182 81.