ATX PSU to Work Bench PS - Adjustable Voltage and Current question Answered
I am working on converting an old 600W ATX PSU to a bench power supply for me to use for some lab work. Not everything that I will be plugging into it will have built in current limiting capabilities. The guide/setup i found on here that I will most likely be following are: https://www.instructables.com/id/DIY-PSU-into-Bench-Power-supply/ & http://www.wikihow.com/Convert-a-Computer-ATX-Power-Supply-to-a-Lab-Power-Supply
The first link is how I would like mine to end up looking.
My PSU is rated as:
+3.3V @ 32A
+5v @ 50A
+12v @ 24A
-12v @ 1A
-5v @ .5A
My end goal is to be able to control the voltage and current output from each binding post. I will be hooking up a multimeter to this as well and am thinking that i could control what it monitors by some dipswitch setup or switching setup(as far as to which binding posts it's monitoring).
I do understand that V = IR. So keeping 5v but only wanting 3A, i would increase the resistance which is why at first i thought i could play a POT in the circuit. However after seeing how the voltage regulation was hooked up, I am confused how to do so now since it was connected in the fashion i thought i would need to control the current. (https://www.instructables.com/files/orig/F2D/LMFU/FYYNECNH/F2DLMFUFYYNECNH.jpg)
I would probably use a LM338 since it would allow for more current but again, i would love to be able to have the full 50A available all at one shot but i don't think those IC's allow for that.
I am extremely new to all of this and am still learning as well, so if i was able to communicate what i am looking to do correctly and you have a way of explaining it to me, a picture would be awesome if you have the time to create one. :D
TYIA for any suggestions.