ATX psu modding
Hi Resqueline.
Thanks for your reply. So i really only need the 12 volts rail on this particular atx unit for radio use, i will google around as well, but do you think its a tall order to rearrange from the 5 volt rail to the 12 volt rail, i think i am going to need to break a schematic down to find the answer, all these units put out about the same spec, but slight difference in lay out and components from one unit to the other.
Ive modded a few now, and on some, regulation is better on some than with others. I dont expect perfection, but the same regulation under load on the 12 volt rail as there is with the 5 volt rail would be a plus, i have got large currents out of some units, but usually at the expense of a voltage drop, about the low end of the 12 volt rail so 11.40 volts at about 8 amps or so, the supply could manage more if the load regulation was switched over from the 5 volt rail, while 11.40 volts will still power what i want, its a little low, most of the gear is rated for 13.80 volts use, but i know there is a tolerance there for this gear, 11.50 volts on the low end and 14.50 volts 0n the top end, the steady 12.20 volts or close would do fine.
Not only that, but i know the 12 volt rail was not intended to be the driving regulation on load for that rail.
I would think i am looking for the feed back, or some kind of comparator part of the circuit on the 5 volt rail. I will try and find a schematic close in operation to what i am looking for.
Dave.
