Has any one built a good PSU?

[1031.nu]

I'v found a few schematics here and there, some were complete some where missing part #'s and ratings.. things like that ... Any way I'v seen in the past schematics for 12v DC powersupplies people had built in the passed and have recommened but not sure where to find them. I think overclockers.com has a few simple designs but I was looking to see what some other people may have done.

[n00b 0f l337]

Talk to bloody sorceror.

[Bloody_Sorcerer]

I'm still only doing linear supplies, though I'm learning as much as I can about switching supplies (much more efficient and smaller), though I doubt I'll be able to build a decent switching supply for a while. I know alllllll about linear supplies though. (less efficient, bigger, cheaper, MUCH MUCH MUCH EASIER!!!)

[snipper_cr]

I built a linear power supply (650 watts @ 13.9 volts)... It was a beast... a freaking BEAST. The thing weight about 10 pounds (because of transformer) and was a pain to handle that much power.

I had it power a 320 watt peltier with no problem but never could get tests done long enough. Wires were to hard to manage (so damn thick), couldnt properly insulate wires or keep solder connections...

I still have the parts if anyone wants to tackle it. Includes transformer, diode bridge, caps and amp meter (reutinely drew 25 amps on the peltier i had).

I eventually switched to a 24 volt peltier and got a switching PSU to go with it.

[gionag]

how much does the transformer cost ?

[Bloody_Sorcerer]

no buying/selling (or discussion of) in public forums.
Wow, only 10 pounds for 650 watts/14v? impressive... my 12v@35a is 10 pounds all alone.

[snipper_cr]

no buying/selling (or discussion of) in public forums.

Chill... :stick:

And the transformer i have had several settings with these 4 (A,B,C,D) wires. If you applied AC to A and D you got a certain voltage, if you applied power to B and C and CROSSED A and D you got a defferent voltage and so on (something like that). I think the most wattage was 12.9 volts at 700 watts or 16.9 volts at 550 watts (exact not sure).

Although when i voltage tested it, the volts were often up by a few so i used the lowest (and got around 15).

Linear power supplies, while quite cheap to build (out the door, xformer, caps, bridge, amppanel) less than 50 bucks. Although if you spent, say, 150 on a switching power supply, for 2 years i think youd save that extra in electricity :-P