ATX Bench power supply latest Aug 2019 .

 

The latest and easier way to convert the ATX computer power supply to a bench power supply.

An easy conversion just trim the exes wires and use the original loam to plug it in to this board and bolt it on top of the power supply using stand offs ,or in any other convenient place and start using it as a bench power supply.  With all the usual voltages. This board is sold by Bangood and is very affordable.

ATX Bench power supply

Picture on the left the  450 W  ATX computer power supply stripped and all plugs removed ready for the next operation. . For this operation we also mounted the cooling fan on the outside of the power supply casing simply because of the limited  space available.

Picture on the right all the wires prepared, the on/off switch fitted , plus the three Binding post. The + 12 V + 5V + 3.3V covered in heat shrink , guard fitted over the cooling fan

Picture on the left all wired up and ready for boxing up. And testing the system , the ground wires are bundled together but I have not made up my mind how to finish those off yet.

The final solution for my ground wire is , I soldered all the wire together and fitted a binding post to the end and covered the multitude of wires in heat shrink

Picture on the right all boxed up and fired up with all the LED glowing merely.

Picture at the bottom left the power supply connected to my multi meter and showing the right voltages

 

Diagram right hand side top taken from the internet, "You-tube" there are many examples , and as many variations but the basic systems are all more or less the same.

Check it out I varied my design a bit as I have 3 LED's fitted and all the designs I have seen from other people just have two LED's

But one can be creative and put your personal taste to the design. Just be careful there are a couple of big capacitors on the mains supply and they may give you a powerful kick. After disconnecting the unit from the mains give it some time to unload.

Always play it safe

Pictures below show the second power supply made. The pictures from left to right showing the possible  voltages achievable