Modding a PC Power Supply into a 12 Volt Supply for your DC charger

[mahgninnuc1]

No problem, I also found a pinout from hp, but the walk through on rc tech did a much better job than the pinout from HP.

 

[nikssehagal]

I am a new to this forum so I have a one question that how can I PC power supply into a DC charger.Anybody knows that this problem of solution then reply me.I want to know that how can it possible.

 

[matt*strike]

I just wanna say what a great write up I'm gonna start my own ps converison tomorrow got to ps to try hopefully I can make two and not just fry one and get the other one

 

[matt*strike]

Got both my ps done and charging fine both put out at least 15 amps. I know that cause one chrger is 7 amp max and the. Other is 8 amp max. Both ps will power them both fine. I spent around 15 bucks for everything at radio shack for both ps converisons. Thanks again for a great write up.

 

[matt*strike]

Just a quick pic

[/IMG]

 

[iamsuperbleeder]

I snagged another PSU out of a computer that was getting thrown away at work. I think I'm going to convert this one over and actually use it at work. I need a 12v source other than a battery to test aftermarket radios that come in some of the cars we get (I work at a salvage yard, LKQ).

I tell you though, this little converted PSU has come in very useful, aside from powering my charger. I used it this past weekend to power up an LED array I'm making; making a custom LED 3rd brake light for my truck.

 

[halon]

Here is my little power supply in action. Got it from a dead pc. It works like a charm!"thumbsup"

 

[stanmondz]

i built mine about a year ago.added a 5v a tap few months ago to run my lathe.
i run the same B6 charger above and a hobbyking 6-10 charger. both run at the same time no problem. i havent tried running the lathe with both chargers yet.

i think its 14 amp on the 12v rail, dont remember what the 5v rail is. it came out of a old Dell PC

 

[speed king]

after this mod my power supply wont turn on, the green wire is shorted to black, and i have everything but the resistor, could that be my problem?

 

[warren]

i just recently got a new pc powersupply to mod and it has 12v 18a A and 12v 18a B. do i still tie all the 12v wires together? the wires are 3 yellows and 5 white wires. thanks for any help.

 

[Charlie-III]

I just recently got a new PC power supply to mod and it has 12v 18a A and 12v 18a B. Do still tie all the 12v wires together? The wires are 3 yellows and 5 white wires. thanks for any help.

What power supply? Make & model can help (once you have the info, Google it as well).

Sounds like you actually have 2 12V 18A circuits in it, I would keep them separate if there are 2 circuits.

 

[warren]

What power supply? Make & model can help (once you have the info, Google it as well).

Sounds like you actually have 2 12V 18A circuits in it, I would keep them separate if there are 2 circuits.

they appear to go to the same spot on the circuit board though. i will look that info up too.

 

[smoedog]

post a picture of the guts, you don't want to tie the two rails together. Just put 2 sets of posts to hook up multiple chargers

 

[smoedog]

after this mod my power supply wont turn on, the green wire is shorted to black, and i have everything but the resistor, could that be my problem?

yes the resistor is what puts a small load on the power supply to simulate it actually being plugged into a mobo

 

[warren]

post a picture of the guts, you don't want to tie the two rails together. Just put 2 sets of posts to hook up multiple chargers

i guess this one doesn't matter. i'm trading it for a better one anyway. "thumbsup"

 

[Zrock]

i tied both rails together on my charger and it is rock solid.. The more load i put to it the better it works.. Voltage never seems to drop.. Instead of a resistor i just used the second fan to create a load on the 5v rail

 

[Olle P]

Warning:
... anything above 30 milliamps/volts can kill you in a matter of time if it somehow penetrates your skin...

It's not at all as safe as this...
A "safe" current hand-to-hand is only 0.5 mA, not 30 mA!
(Near the heart only 0.05 mA can be considered somewhat safe.)
I work with medical devices on a daily basis, this kind of knowledge is part of my profession...

... my power supply wont turn on, ... i have everything but the resistor, could that be my problem?

yes the resistor is what puts a small load on the power supply to simulate it actually being plugged into a mobo

Not all PSUs need a load to operate, but most older designs do.

 

[madgyver]

Here's mine that I built on a raining Saturday morning.
Power supply - free
Parts from RadioShack - less than $20.
It was a fun build, got the USB ports from a PS3 unit that crapped out. Also building another one with the PS3 power supply.

 

[madgyver]

Here's mine.. Along with the grd, 12v, 5v, binding posts I also made external test leads and added USB charging ports.

 

[madgyver]

Also built one using a PS3 power supply and using the dual USB charging posts.
I can leave this one on my toolbox. 12v @ 32a