Make 350W Power Inverter 12V 220V From OLD Computer Power Supply

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Intro: Make 350W Power Inverter 12V 220V From OLD Computer Power Supply

Hi Guy today we make Make 350W Power Inverter 12V 220V From OLD Computer Power Supply

Step 1: Step 1: Watch This Video

This video show you how to make 350W inverter from old computer power supply.

Step 2: Step 2: Make the Schematic

In this schematic i use Sg3525 and 2 mosfet IRF3205 with transformer from old PC power supply.

The max power can reach 350W.

I use Eagle software for make Schematic.

Step 3: Make PCB by Upload Gerber File to the JLCPCB.COM

Go to JLCPCB.COM for make PCB online

Only 2$ /10pcs for 2 layer PCB and Big Discount on First order Shipping

Upload your gerber files and fill in Shipping Adress then click PAY.

Step 4: Received Your PCB After 2 Day

The PCB look great and so beauty

Step 5: Order the Component

List of part here:

You can buy it from any electrical store.

1 x heat sink

2 x IRF3205

4x 150Kilo ohm resistor

1 x 47 ohm resistor

3 x 10kilo ohm resistor

2 x 100 ohm resistor

3 x 20kilo ohm resistor

4 x FR307 Diode

1 ATX transformer (from old computer power supply)

1 x resistor 330kilo ohm

3 x 104 capacitor.

1 x 102 capacitor.

1 x 100uf/16v capacitor

1 x 1000Uf/16v capacitor

1 x 220uF/400v capacitor

1 x IC KA3525 (Sg3525)

1x Inductor( from PC power supply

Step 6: Solder PCB

Solder all component to PCB. We have the name on the top PCB. So this very easy

Step 7: Check Again.

Check all component were correct.

Step 8: Finish and Test

1: Connect the output with Load.

2: Connect input with battery. I use 12V battery

Be Careful with high voltage, electric shock will kill you do not touch any output component

Thank for watching

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4 Discussions


8 months ago

Saying that this is made from an old psu is like saying you made a car from a spare tire... you used 2 commonly available parts from a psu and purchased a whole lot more & a custom pcb. Granted you could mention that in your parts list that these could be obtained from an old psu but the title to me implies that by reconfiguring and adding only a few parts to an old psu you made an inverter.


8 months ago

No, it's not my problem. It's your project so it's your problem. As the author, you bear the burden of accuracy and clarity for the reader. I'm simply pointing out that your schematics are incomprehensible. Your understanding of the circuits you are presenting isn't evident.

I think your time would be better spent improving the quality of your technical illustration so your schematics make sense, learning some electronics theory so you can explain the circuits you present, and practice your PCB layout so the parts fit correctly and are in the proper location.

It doesn't look like you know enough about what you are doing to present the project in way that someone else can follow along without a lot of confusion and wasted effort.

And quite frankly, in this case it looks like you have reverse engineered a manufacturers product and are now trying to sell a PCB layout for it.

It is not sufficient to specify the switching transformer in terms of, "Just get any switching transformer you find in any ATX power supply that just happens to be laying around". No. That will not work.

You are even specifying a filter inductor in terms of, "just get any filter inductor you happen to find in an old power power supply". No. That will not work either.

There are a lot more issues with this project. I could go on. But...

Instead of addressing my comments, your public response is "go away". That speaks volumes to potential customers that your goal is not to educate, or even attempt to deliver a useful product. You are only in it for the money.

1 reply

8 months ago

The usual incomplete and incomprehensible project promoting junk circuits and PCBs from JLCPCB. This is nothing more than an advertisement. No one can reproduce this project with the information provided here. Based on the results I see on Instructables, no one should consider JLCPCB for any PCB work.