kpk Posted February 27, 2007 Report Share Posted February 27, 2007 Hi folks,I read through the article below describing how to make a lab power supply from an PC ATX power supply. The link is here:http://www.wikihow.com/Convert-a-Computer-ATX-Power-Supply-to-a-Lab-Power-SupplyI would like to make this a variable power supply that can generate the full rated amperage. I will need about 12V and up to 10A on the 12 V setting and up to 25A on the 5V setting. I am extremely electronically challenged so please be as explicit as possible using laymans terms. Thanks. Quote Link to comment Share on other sites More sharing options...
jgeidl Posted February 27, 2007 Report Share Posted February 27, 2007 The power supply will supply amerage up to it's rated amount automatically. Amerage output is determined by the "draw" of the components or circuits that are using the power supply.Jim Quote Link to comment Share on other sites More sharing options...
kpk Posted February 27, 2007 Author Report Share Posted February 27, 2007 Yes, I understand that. But I want to control the voltage and/or current like a benchtop power supply does. It would even be nice to put an ammeter on it so I can see what's doin'. Quote Link to comment Share on other sites More sharing options...
ante Posted February 28, 2007 Report Share Posted February 28, 2007 You can easily make the voltage variable but the current is not that simple. This will involve a major reconstruction to achieve! Perhaps it Quote Link to comment Share on other sites More sharing options...
kpk Posted February 28, 2007 Author Report Share Posted February 28, 2007 Well I could probably live with just varying the voltage so long as I can still get a decent (like 10A) out of it at 12V. I would be very appreciative if you can explain what I need to and what components I will need. Quote Link to comment Share on other sites More sharing options...
ante Posted March 1, 2007 Report Share Posted March 1, 2007 You have to find the voltage feedback loop and try to figure out how it works on your particular PSU. It is easier if you have a schematic. Quote Link to comment Share on other sites More sharing options...
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