A good DC switching power supply circuit form old computer that not used. It has used powerful, durable and works great. Present, a computer become the electric appliance power needed for every home Because there are very useful. But lifetime limit and out of date very quickly. There are new program. 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. -Sometimes you may have [...]

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