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break the output and the other circuit that I am testing can’t burn
Why not simply put a potential divider across the reference?
Another option is to simply increase the value of the sense resistor.
He right I use 1 every day I just use a resistor to limit the current . And as a plus I have 5+ to 5- and 12+ to 12 - and just the go old 5+ to gnd and 12 + to gnd. You may want to check this out.https://www.electro-tech-online.com/custompdfs/2009/03/AN10322_1.pdfSo toss a variable linear regulator on the 12 volt line of the ATX supply. Easier than designing one from scratch. Constant current can be done pretty easily with a Mosfet and a current sense resistor.
I'm confused.i want to use all 2,7A that the psu can give at his outputs, and i was thinking of that but constant current regulation is better...