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

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Old 05-16-2012, 08:36 PM   #121
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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.
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Old 05-28-2012, 01:49 PM   #122
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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.
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Old 06-08-2012, 10:57 PM   #123
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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
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Old 06-10-2012, 04:50 PM   #124
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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.
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Old 06-11-2012, 01:19 AM   #125
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

Just a quick pic
[IMG][/IMG]
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Old 07-18-2012, 12:48 AM   #126
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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.
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Old 08-12-2012, 08:29 PM   #127
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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


Last edited by halon; 11-14-2013 at 07:55 PM.
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Old 08-12-2012, 09:05 PM   #128
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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

Last edited by stanmondz; 08-12-2012 at 09:08 PM.
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Old 10-04-2012, 11:22 PM   #129
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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?
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Old 12-23-2012, 09:23 AM   #130
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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.
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Old 12-23-2012, 09:32 AM   #131
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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Originally Posted by warren View Post
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.
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Old 12-23-2012, 07:30 PM   #132
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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Originally Posted by Charlie-III View Post
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.
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Old 12-25-2012, 10:25 AM   #133
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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
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Old 12-25-2012, 10:28 AM   #134
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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Originally Posted by speed king View Post
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
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Old 12-26-2012, 05:28 PM   #135
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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Originally Posted by smoedog View Post
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.
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Old 02-09-2013, 08:48 AM   #136
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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
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Old 02-11-2013, 01:28 AM   #137
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

Quote:
Originally Posted by TwistedXT View Post
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...

Quote:
Originally Posted by speed king View Post
... my power supply wont turn on, ... i have everything but the resistor, could that be my problem?
Quote:
Originally Posted by smoedog View Post
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.
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Old 02-25-2013, 10:09 AM   #138
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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.

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Old 02-26-2013, 07:57 PM   #139
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger



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

Last edited by madgyver; 02-26-2013 at 08:04 PM.
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Old 02-26-2013, 08:01 PM   #140
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Default Re: Modding a PC Power Supply into a 12 Volt Supply for your DC charger

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

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