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Home-grown Bench Power Supply


#1

On another thread, Ian mentioned his intention to repurpose a PS3 power supply into a bench PSU. Anyone have experience with repurposing laptop or PC power supplies into a bench PSU? Worth the time and effort? Any favorite online tutorials?

I’ve got a wall wart right now that I use with my Spider via the USB Client DP module, and also with my breadboards via a Sparkfun 3v3/5v breadboard power module, but the wall wart maxes out at 1A.


#2

By PSU, do you mean something where voltage and current are adjustable (and displayed), or just something with more current than your wall wart?

For the latter, there are a ton of online tutorials for modding ATX style PC power supplies. I usually start with searching instructables. Example: http://www.instructables.com/id/Convert-an-ATX-Power-Supply-Into-a-Regular-DC-Powe/

SparkFun even has a breakout for doing this. http://www.sparkfun.com/products/9558

I scavenged parts off a busted HoMed back massager that had a AC-DC transformer and a step down circuit. I added some parts to clean the signal, and stuck it in a Radio Shack project box. Regulated 12V 3A for about $5 8)

Definitely worth the effort, and you can feel good about saving one more piece of electronic “junk” from the landfill.


#3

Here’s a very simple one that will satisfy a lot of needs that I had bookmarked a while back if you really want to start from scratch.

Here’s a nice one made from an ATX PSU.

http://www.bing.com/videos/search?q=converting+a+ps3+power+supply+to+a+bench+supply&view=detail&mid=E332B7911FD9E4D16D89E332B7911FD9E4D16D89&first=0&FORM=LKVR8