Quote Originally Posted by ZorAxe View Post
Hi there guys,

I'm looking for a power supply for my Prusa i3 that I'm building. Is it possible to use a PSU from a desktop computer? If so, how many watts do you need?

Thanks
Probably... It would be worth while to search for Prusa I3 and ATX power supply. A lot... If not most of the Prusa's use ATX power supplies. That is the combination I have. Probably, you can get a high wattage ATX supply on eBay for $25 including shipping. Most of the high current is on the 12 volt supply. Make sure you have sufficient wattage on that supply. But still, having multiple supplies on the 5 volt is good too because the Auto Bed Leveling servo's tend to need its share of current from the +5 volt supply and it is just easier to isolate it and keep all of the power clean by using separate supplies for the current pigs.

I'm sure somebody that knows what they are talking about will jump in if something crazy gets said.