Small Powerful and Cheap Bench Power Supply

Introduction: Small Powerful and Cheap Bench Power Supply

About: I'm 13 years old and i like to make electronic projects. I want to study electrotechnics. Thank you for visiting my instructable page. See you later.

This project is based on ATX power supply so if you have some laying around you can make this project.

Cheap, easy, powerful and AWESOME power supply. You won't need too much components and it’s for beginners.

When I said powerful, I mean a really powerful. My ATX PSU can give from 12V 10A, from 5V 10A and from 3,3V 12A which is a lot, but you can have even more powerful one (I had only this one available).

As I said it’s very easy, simple and cheap (for me it cost about 15$, because I had the ATX power supply for free)


basic soldering

some patience (some things are hard and frustrating)

and drilling

Step 1: Components That You Will Need

1. a plastic box (I used this one - 120x80x50mm)

2. 1 black banana socket and 3 red sockets (link is at the end)

3. USB socket

4. mini power switch

5. one 3mm red led with 1k rezistor (these worked the best for me, because I am using 5V)

6. one 3mm green led with 220 ohm rezistor

7. (optional) car cigaret lighter plug

8. ATX power cable extender (be careful to check the pins on the main ATX cable - there are two types - 24pin or 20pin)

9. tools : a drill, soldering iron, screwdriver, some glue (I recommend the epoxy glue), pliers and some wires

Step 2: Gather All Components

Step 3: Drill the Holes

for: banana sockets, USB connector, power switch and leds

Step 4: Solder All Components

I recommend to add shrinking tube to all connections.

Step 5: Make Some Final Touches

Step 6: My Collection of Power Supply

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    Mark Boulton
    Mark Boulton

    Question 2 years ago

    Hi, I made a bench power supply out of an ATX and added a USB port, but when I try to charge my phone the amperage delivery is very low, it takes forever and sometimes wont even charge any idea why?


    Reply 1 year ago

    Maybe you swaped the 5v lines, there is one small amp line, and other high amperage one. Make sure you are using high amperage one. And use enough thic cabels.


    4 years ago

    Welcome to the club: Just a note to let you know I have added this instructable to the collection:

    Encyclopedia of ATX to Bench Power Supply Conversion


    Take a look at about 70 different approaches to this project. This topic is one of the more popular of all instructables.

    DIY Hacks and How Tos

    Nice design. I made a power supply similar to this one and I use it all the time.


    Reply 4 years ago

    Thanks, i use this power supply too because it's really powerful and i like the design.And i made it myself.Thanks for comment, see you later. :)