I Made a Linear Regulated Power Supply

Today, I will show you, How to make a regulated linear power supply. This mini A.C To D.C regulated supply can be used in any electronic circuits, for ex: Amplifier, Battery charger, Arduino Project & etc.

Before Starting The Project Tutorial

A Special Thanks to NextPCB for Supporting and Providing PCB'S for this project.

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• A real PCB Manufacturer
• 24 Hours Lead Time
• Reliable & Low cost PCB

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So, Lets get back and start our tutorial now.

Supplies Needed To Make This Project

1. Soldering Iron kit
2. PCB holder
3. PCB
4. Electronic Components
5. Lead Trimmer

• 2 x 1000uf 25V Electrolytic capacitors
• 2 x 470uf 35V Electrolytic capacitors
• 4 x 100nf 63V Nonpolar capacitors
• 1 x LM7812 IC
• 1 x LM7912 IC
• 1 x KB207 bridge rectifier
• 2 x JST XH connectors

At First I started up with designing the schematic in a Pcb designing software(eda). first placed the both input and output connectors for the project, then placed all the required components i.e: bridge rectifier, electrolytic capacitors, non polar capacitors, and the main voltage regulator ic. and the connected all of them in their required configuration.

After making the schematic, I started converting the schematic to the main pcb design, first I set the dimensions of my project pcb. then slowly slowly, arranged all of the components, in such a way that the pcb tracks stays in single layer and does not get complicated. then started connecting all the components to each other, and drawing the connecting tracks for each component. After that, i started adding text on the pcb design. And then simulated the design and finalized it.

Ordered and got the pcb's. Then I started Assembling my project, started up with placing the smaller components first on the pcb. Placed the input & output connector first on the pcb, then placed the 4 non polar capacitors on their marked position on the pcb. Then started placing the main voltage regulator ic's. After that placed the bridge rectifier according its marked position on pcb. And at last mounted the electrolytic capacitors on the pcb.

After completely mounting all components on the pcb. I started cutting the extra leads of the components. By using a special component lead Cutting tool. After cutting the leads, examined that all the leads were trimmed properly.

After examine the trimmed leads, I again placed the PCB on the PCB holder, and started soldering. I started soldering. by keeping the soldering iron at 350 Degree Celsius. and Soldered all the components and each of its legs slowly slowly. After soldering all the components, I rinsed all the extra flux on the pcb by using a reducer and cleaned the pcb. And here our project gets ready to test.

After cleaning the pcb using a reducer, it was completed and was ready to test. Then I started testing the project, I used a dual 25v A.C. Transformer and connected the output of the transformer to the input of our project. Then connected the output of our project to a D.C Voltmeter. Then started the Power Supply. and noted the readings on the volt meter. and the readings were perfect, and our project got successfully completed.

To watch the Video Tutorial Of this Project: Click Here

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