Many electronics circuits and projects for learning in simple ways.

5 PC power supply circuit for you

A good DC switching power supply circuit form old computer that not used. It has used powerful, durable and works great.
Present, a computer becomes the electric appliance power needed for every home Because there are very useful.

But lifetime limit and out of date very quickly. There is a new program. A desired machine that has high efficiency. You can always change the new. (To a modern).

-Where is the old computers? Most probably it will be discarded as spam. This may be very valuable for many people, including me. Many of the neighbors gave me an old computer always to make the projects.

-The first thing I like to use is the power, even if old but powerful, durable and works great. But it should always be properly grounded. To prevent electrical leakage or electric shock. Normal voltage is 3.3V 5V 12V and a lot more.

5V 12V 15A max Switching mode supply circuit

This is a 5V 12V Switching mode supply circuit,15A max.  It is an old schematic of 200W PC power supply. This circuit is suitable for repairing. I use TL494 popular IC as main. In circuit has a dual output in 2 parts.

  • 5V 15A and -5V 1A
  • 12V 10A and -12V 1A

TL494 which is popular IC PWM

Switching supply computer 5V 15A 12V


Source : I don’t know a source.

I hope that this circuit may in rows checking meditation repairs a computer has of friends. By think use the integrated circuit number TL494 again. And still use the transistor power as well.

Repair Dell GX620 computer with myself

I had been using Dell GX620 Computer for a long time because it has good and durability. I lost it some days ago. My friend who is a computer repairer said the power supply is having a problem. He told me to buy it at amazon.com, they are very nice it has low cost and free to deliver too. Read more

Sometimes, changing the computer power supply circuits of the series may be impractical. Because buying it did not Or might be too expensive.

To repair the power supply of the computer to fault finding. It is a good solution. Which normal circuits this manner power. Often designed to be a low-cost equipment first. Such as fuse resistors. Small transistors. Or capacitor type electrolyzed-friendly, often the problem, the solution to deteriorate, especially on older computers for about 10 years.

Repair Dell GX620 computer with myself

For ease of repair, we need to have a circuit.I suggest the following circuits…

-Sometimes you may have to use the old computer. The children will learn the basics or playing simple games. The power supply circuit is damaged. What to do?

-Highlights of the Ninth Circuit is old technology, it’s the easy part. But sometimes it can be hard to find circuits. I collect old it plan to guide the repair or modification is not limited. There are 5 circuits, as follows. (see below!)

200W PC power supply circuit switching 110V-220V

200W PC power supply switching 110V-220V
This be PC power supply for Computer again interesting circuit. May advantage with friends at do an occupation can repair a computer? By think be the character Switching power supply 200W sizes take AC Voltge Source 2 level be 110V and 220V choose can use leisurely. And still use volt out many the group be +5V ,+12V, -12V enough will use for small-sized computer or AT power supply. When see the circuit will think use the integrated circuit IC TL494 power supply circuit be pillar equipment. Make the circuit sees not difficult or repair easy there. The detail is other , please see in the circuit better.

Compaq PC power supply circuit 200W

Compaq power supply 200W
Today a friend who is computer repairman visits a house. He thinks I do the website totals up the circuit. Then give Compaq power supply 200Watt Circuit keep announce on the website. By he brings from other website has can’t remember the name already. As I see are not sure alike that yes the circuit of Compaq Computer or not. But thank your this friend. It is good often give me always. At least hope that this circuit may advantage with friends.

Old Computer PC power supply circuit using TL494

Old power supply computer by TL494
An elder brother of me works about repair a computer. Once meet a problem power supply Switching , of a computer s lose. It is old circuit. I then help to seek give. Get this circuit think may disagree. But enough use can replace. if friends meet same this problem try out please. It can give voltage output 5V , +12V,-12V. Use the integrated circuit TL494 be pillar equipment seek good easy.
By apply to voltage 110V and 220V choose done to a turn SW1. The detail is other a friend sees in the circuit.

Computer power supply circuit 230W 220V

Computer power supply circuit 230W 220V
Here circuit power supply for computer 230W 220V.
it use IC TL494 and Transistor.
Out put 5V , 12V

250W china Computer power supply circuit

250W Computer supply china circuit

A friend of me inquires about power supply switching circuit. Which produce from the People’s Republic of China model the circuit is all. Be the Chinese seek difficult many circuits. I then try to seek many circuit. Meet this circuit. Think may yes. Because of there is the Chinese controls all equipment detail. But must beg one’s pardon friends. With that model the circuit not clear however might enough in rows the profit ? A few the a little when see good as a result see equipment position understands not difficult extremely. There is the integrated circuit TL494 with and can give voltage output get +12V,-12V and +5V support using has usually.

This Post Has 5 Comments

  1. I have an old supply atx 2507fwp .l want to make it battery charger. Can u help me.also required schematic diagram.pl help.

  2. hellow.please send me sch a power supply with
    in put 220vAc 50Hz
    out put:100-260VAC Variable /21KHz
    good luck.

  3. Hi nazeryeh,
    Thanks for your feedback.
    Now, we don’t have circuits as you need.

  4. #5V 12V 15A max Switching mode supply circuit

    Why is it not galvanic seperated between main and low voltage ? And how to implement if one would do so ?

  5. Very shortly this website will be famous among all blogging and site-building people,
    due to it’s nice articles or reviews

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