Recent content by DellAxim

I'm not a moron. I have worked with electronics since I was a small child. The only thing I am not familiar with is lead acid charging voltage, because lead acid batteries are obsolete. (Thus a large battery I have no use for) My home is powered by a solar system I designed and installed...

I happen to have a 12v, 22AH SLA battery sitting around, and it's just going to go bad if I don't use it for something. I want to make a 12v DC UPS to power my router. The concept is very simple, I charge the battery with a DC-DC power supply powered by a wall wart which allows me to adjust the...

You mean like...a BATTERY?! *GASP* Perhaps in a car?!!!?? Where might somebody find such exotic things?! Everybody knows small computers idle at 450 watts right? Shit my lawnmower puts out more amps than that... Keep your geek pants on, I was just making a suggestion. Clearly I was not...

Yeah, my biggest concern is the caps, though they seem high quality and mounted nicely with a bunch of silastic smeared all over. At $20 shipped I think I'll get a few more as spares, it came with a nice set of ATX cables also. I'm guessing somebody replaced these after a period of time for...

+12v - 38A +5v - 30A +3.3v - 10A -12v - 0.5A Combined total 456W MAX Also says "Date code 0935" - anybody know what that means? Probably not for the latest and greatest mining rig, but not bad.

Alright, I finally had a chance to hook it up to the batteries. It works! White-positive black negative. Green wire plugged into building ground. Anybody that needs a good DC power supply should consider trying these, they're cheap on ebay and better quality than a lot of those cheap chinese DC...

Thank you for the info. I won't be able to power it up for a couple days but I will post the results. The ground wire is indeed floating.

I'm not very good with discrete electronics but this is as detailed as I can get. In the top left corner the two pins you see are the chassis ground. The 5 pins about 1" below that are the white wire on the outside and the black wire on the inside, with the fuse on the white side. The input...

Did you bother to read any part of this thread?

I expected others who know about power supplies to help, and that's exactly what they are doing. This is not a major mystery. I suspect there are people here that work in the industry and may know exactly what I am talking about. There is a 50/50 chance it will work if I randomly pick wires...

When you have nothing of value to say, it's generally best to just hit the back button. This is a cheap surplus power supply, not a nuclear generator.

Another clue - there is a 20A glass fuse on the input, tied to the white wire. Do they put the fuses on the positive side in -48v stuff?

I'll try to do that tonight. Can't see anything from the top but maybe if I unscrew the board again.

Nope, totally blank, except for the label that says -48v. I checked the green/yellow with DMM, like I said that touches chassis ground, the black and white do not touch the ground or each other.

I am well aware of what they are for. They are used everywhere in the telecom industry where absolutely everything (even the air conditioning) runs on 48v DC which is provided by giant batteries any time there is a power interruption. It's a facility wide UPS. It makes perfect sense to use in an...