Re: [CAD_CAM_EDM_DRO] how to use a computer power supply for 12v and 5v

Typically computer power supplies are Switching Power Supplies and need a
load on the output. If you have an old floppy drive or harddrive plug it
into one of the connectors and you should be up to 12v.

Buuut, I really wouldnt use that as a Stepper Power supply. 5volts has a
pretty good amperage supply rating but the 12v has a much lower Current
limit and you might be risking blowing more than just a Power Supply when
you finally load-down the motors. Hopefully they wont be under combined
heavy loads but if they will be, and you have a camera, (just kidding) be
ready to disconnect at the first signs of overheating, etc.
Just my opinion..

Vince

> Hi all...Im trying to figure out a way to use my old computer power
> supply to give me the 12v and grnd and 5v and grnd i need to power the
> stepper driver board i have...My question is how do i get it to give me
> the power? It is not hooked up to anything...just got the connections
> dangling...When i plug the power cord in to the wall, using my test
> meter i can find only 1 wire that will give me the 5volts i need, but
> none have the 12 volts...What do i have to do to get 12 volts
> also?.......I tried searching this topic and did not find much,so
> hopefully this not TOOOO basic of question that has already been
> answered......Im new to this machine assembly stuff......but this board
> has been the BEST place....Thanx for any and all help ! mike
>
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