Mod 12VDC 32Amp Power Supply : Need Help! - Page 2 - RC Groups
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Jul 02, 2010, 05:59 PM
30 RC's and counting
Bmr4life's Avatar
Quote:
Originally Posted by himagain
WARNING........ If you make a 24v ps out of two of them make sure that the two cases don't touch each other or you will short them out...... Boooooom
Thank you for that information.
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Jul 02, 2010, 07:35 PM
30 RC's and counting
Bmr4life's Avatar
Man, I don't think that could have been any easier.

One PS says 11.97V, other says 12.00V.

Here's a picture of the first one I did.
Jul 09, 2010, 07:15 PM
KB3VOJ
cherokee180c's Avatar

re


Here is my final product. Works great. Anyone turn these into a 24V supply yet?
Jul 11, 2010, 01:05 AM
30 RC's and counting
Bmr4life's Avatar
Is that liquid tape?
Jul 11, 2010, 02:09 PM
KB3VOJ
cherokee180c's Avatar
No, it was a type of electrically safe silicone that they sold me at the electronics store to cover the circuit board. I just waited till if fully cured to turn on as I thought if any moisture was still present might cause an issue. Works great though.

I have been following the 24V PS posts, but most seem to think it is a very bad idea to float the ground on the second PS in series. Just wondering if anyone has taken this HP PS yet and tried it. I have a second one sitting around and if I can do it safely, I would love to have the extra power to charge more 6S5000 packs simultaneously on my 3010B 1000W charger that can handle a 25V supply.
Jul 11, 2010, 03:16 PM
Southern Pride
everydayflyer's Avatar
If you have read the Threads(post) then you know it will work and the possiblle dangers. Any power supplies can be used in series if you prevent them from sahring a common ground. On the other hand a metal case without a true earth ground can become electricaly hot and deliver a most unwanted shock.

Charles
Aug 01, 2010, 10:12 PM
Registered User
Quote:
Originally Posted by himagain
Hi Guys

Ive managed to get one of these power supplies powered up and working ok.

Its rated at 32A and I've had it running at 20A without it getting warm at all

Heres the solution ,

- Simply connect the 3 pins in the photo to ground. There are 4 grounds/negs, these are the ends of both sides of the boards.

- The 12+ is the long middle section on the top

- Connect all 4 grounds together and this is your negative

- Cover the pcb with "Magic Plastic" to prevent any shorts

And your done

Any questions give me a shout

Enjoy

David
Thanks, David. I think I can get one of these so your info will be invaluable.

Lindsay.
Sep 14, 2010, 03:06 PM
I have no friends
Thank you for posting this, I just came across 20 or so of these getting tossed at work.

I love it when we retire servers.
Feb 23, 2011, 11:04 PM
Registered User
Here's how I did mine. I wanted the wires soldered going into the case to minimize being pressed on in my storage box.




I've since covered with non-conductive silicone to seal the open blades.

I tested and get 12.2v under no load. Dropped to 11.7 under load charging 22.4volt battery at 11 amps (drawing 247 watts)
Last edited by Rogman88; Feb 24, 2011 at 11:14 AM.
Feb 28, 2011, 02:31 AM
Registered User
himagain's Avatar
Quote:
Originally Posted by Rogman88
Here's how I did mine. I wanted the wires soldered going into the case to minimize being pressed on in my storage box.




I've since covered with non-conductive silicone to seal the open blades.

I tested and get 12.2v under no load. Dropped to 11.7 under load charging 22.4volt battery at 11 amps (drawing 247 watts)

Hi there

Mine doesnt lose its voltage under load at all. Looking at your picture it looks like you didnt common up all the negatives (top and bottom)

This might be help

David
Apr 08, 2011, 10:44 AM
Registered User
How the hell are you guys figuring out which pins to jumper/short/link???
Apr 08, 2011, 10:51 AM
Southern Pride
everydayflyer's Avatar
Most take the easy way out and use ones which have already been hacked.

Thread here has a lot posted. Please note that the Thread is a reference thread with only proven how tos to be posted in it.

https://www.rcgroups.com/forums/show....php?t=1292514

charles
Apr 08, 2011, 03:46 PM
Registered User
himagain's Avatar
Quote:
Originally Posted by Richardmid1
How the hell are you guys figuring out which pins to jumper/short/link???

Richard.... Magic

I worked this one out from a pinout I found on the HP server site. Just a matter of understanding what the pins are, having a go at it and a little bit of luck

Enjoy

David
May 11, 2011, 06:01 AM
Registered User
I have 4 these units, any idea if they can be connected in series easily?
DC ungrounding preferred.
I did not looked inside yet, is there any pot for voltage adjustment?
Thanks.
May 16, 2011, 01:38 AM
Registered User

2 Server PS ESP 113 in serie


Here my solution for 2 ESP 113 in serie (not yet completed...)

Fix the power supply with plastic bolts, so you isolate the ground to the case.

The AC ground (110/230V) you can connect with the case...


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