cla5675

iTrader: (49)

A guy I work with gave me one of these:

http://www.powersupplydepot.com/prod...oduct=17095+PS

I was wondering what I need to do (as far as the wiring) to complete this to use with a DC charger. I can fabricate a sheet aluminum casing and fan mounts. I'm just not sure how to wire up the 3-pin and 13-pin "connectors" (for lack of a better term). Anyone have a schematic out there that might work? Any info is greatly appreciated!!

Bob Malphurs

Kinda hard to say how to wire it, the 3 pin may be your 110v AC in. I'd suggest if you wanted a cheap but good power supply get a $20 computer power supply and convert it to a DC power supply. Here's a link on how to do it.....http://www.instructables.com/id/Conv...gular-DC-Powe/

A 400 watt pc power supply will give you 12v @ about 15 amps. It will also give you 5v dc and 3.3v dc. Those are good for com lathes and motor break-in. Already has the case and fan as well!

94eg!

iTrader: (17)

Shouldn't it put out something more like 33amps? Watts / Volts = Amps

Bob Malphurs

Yes, your right....but part of the wattage is used by the 3.3 and 5 volt rails.

cla5675

iTrader: (49)

Thanks for the info!! I still may try to build it. I've already built a PS from a computer PS, so I've got a little experience with this project. Thanks again!!

blackdragonx118

iTrader: (7)

your right, and your wrong at the same time. the 400 watts is a total of the 12v, 5v, and 3.3v rails. (altho the 12v gets most of it)

94eg!

iTrader: (17)

Oh, I see. I thought you could get the full amount of power through any combination of outputs...

lil-bump

iTrader: (89)

How do you figure how much amperage the 12vdc source would supply? I have a 250 watt pc power supply. I will only use the 12vdc taps.

Bob Malphurs

There's usally a ratings sticker on the side of the power supply that tells the amps of all three....+12v/+5v/+3.3v

I have a 250 watt one, it's rated at 10amps on the +12v rail.

lil-bump

iTrader: (89)

Thanks, All of the stickers are removed except for the model number. I just look up The model number FSP250-60GTA has a maximum load @12vdc of 13 amps.

Thanks for the reply


Pass you soon...

Bigshades

iTrader: (28)

Computer power supplies work well, just be careful if you open it up. Touching a charged capacitor is a very easy way to kill yourself.

lil-bump

iTrader: (89)

I know about capicitors. I worked on a electrical bench for years. The only problem I see is I need to charge a 3s lipo and this power supply barely gets aboove 12vdc a full charged 3s lipo I believe is 12.6

joe of loath

iTrader: (1)

lol it's painful, I've done it... lost control of my arm for a few seconds too.

FOXY923

3s lipo is 11.1v.

lil-bump

iTrader: (89)

That's nominal voltage. A fully charged 3s lipo will complete the charge when the voltage reaches 12.6 maximum!! 4.2 volts per cell