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› New pc power supply conversion how-to
01-13-2010 09:11 PM  8 years agoPost 1
TJinGuy

rrProfessor

Socorro, NM - USA

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I guess more accurately the how-to is finally finished. I have had the write-up done for a while but today I finally got the photos taken and posted. Here is a link if anyone is interested.
http://sites.google.com/site/tjingu...s/convert-pc-ps

- Chris

Team New Mexico
TJinTech

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01-13-2010 11:01 PM  8 years agoPost 2
Busher

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Manchester, England

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I must say i like your site and I enjoy going back there after a space of time to see how it has changed and what has been added.

Keep up the good work i'm impressed

Good luck
Busher

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01-13-2010 11:19 PM  8 years agoPost 3
TJinGuy

rrProfessor

Socorro, NM - USA

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Thanks man. I am running out of topics for the page, any requests?

- Chris

Team New Mexico
TJinTech

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01-28-2010 01:20 PM  8 years agoPost 4
Wamp

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E Berne NY USA

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Thanks, I'm trying to pull this off. I do not understand why the 5v side needs to be working. My trouble so far has been just getting it to turn on. Nice link. Chris

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01-28-2010 03:16 PM  8 years agoPost 5
TJinGuy

rrProfessor

Socorro, NM - USA

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The 5V bus needs loaded, just trust me on that. As for getting it to turn on, it is as simple as grounding the green wire (assuming your PS uses the standard colors).

- Chris

Team New Mexico
TJinTech

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01-28-2010 04:50 PM  8 years agoPost 6
Wamp

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E Berne NY USA

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Thanks for you quick responce and time.
The Dell unit here seems to be standard. Grounding the green wire, woke it up.
The readings I get with my Radio Schacker (no Fluke) are steady, naturally the only load is the cooling fan and meter.
Purple 5.18V, orange 3.43V, red 5.23V, grey 5.23V blue-12V and yellow 12V. These are the most steady readings I'v taken, way steadier than in an old Fender guitar amp. Purple and grey are so close, but different! I know I'm in over my head and will take your advice. I can think of no pactical use for the red, execpt may be to charge an ipod? No such resistors on the shelf here.
How heavy a switch is needed?
Thanks again Chris Just thought! The ballance resister from my old Dodge!

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01-28-2010 09:26 PM  8 years agoPost 7
Busher

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Manchester, England

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You can use the +5v rail for testing servo's or powering a receiver on the bench.
I took +5 -5 +12 and -12 out of mine, they are great electronics power supplies for op amps and dual rail power supply projects. You can also use the +12v and -5v rails connected together to get +7v should you need it. I agree the basic use is 12v to power model chargers but there are other options and if they are there for free why not have them on hand.

Good luck
Busher

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01-28-2010 09:34 PM  8 years agoPost 8
TJinGuy

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Socorro, NM - USA

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If you power supply does not have a switch on it then you could either put a regular small SPDT toggle or push button switch between the green wire and a black. Or you an just solder the green wire to a black wire and just have it come on when you plug it in. Your choice.

I know you are getting solid reading out right now but be sure you load the 5V bus correctly or it won't hold under load.

- Chris

Team New Mexico
TJinTech

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02-05-2010 10:40 PM  8 years agoPost 9
Wamp

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E Berne NY USA

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Thanks again. I grabbed a heat sink from an old graphics board and fastened it on top of the small one in my box (much smaller than in your clear photos) this gave me a place for the resistors, I did find.
The old Dodge ballance resistor did have a 5ohm leg, but no way was it going to fit. Found 2 10 ohm 10 w guys and put 'em parallel.
The 12V rail used to read a steady 12.09V Now it reads 12.42V. Adding an extra cooling fan did not change the reading.
Yup! the load resistors are making heat, too bad. Perhaps a by pass switch for the 5V rail. I'v been using nicads for centering servos.
Proberly keep it simple. Have plenty of little spdt switches, from guitars. Control is nice. Chris

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02-05-2010 11:40 PM  8 years agoPost 10
bowies12

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Surrey - UK

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Busher, -5 and +12 gives you 17v. For 7v I think you meant connect to the +5v and +12v

The 7v output is great for the Align Night Blade Chargers.

Also if you connect on the 12v and 3.3v it gives you almost 9v. Could be useful for a project!

I get 3.3v, 5v, 7v, almost 9v, and 12v on my converted supply.

Fat birds can't fly

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02-06-2010 11:42 AM  8 years agoPost 11
Busher

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Manchester, England

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Busher, -5 and +12 gives you 17v. For 7v I think you meant connect to the +5v and +12v
Just re read my post your right got the - in the wrong place, thanks for the correction.
But I hope it shows that there is more than 2 voltages that can be got from the power supply if you need it.

Good luck
Busher

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02-06-2010 02:33 PM  8 years agoPost 12
geink

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nova scotia, Canada

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Hi,
Is there any way if you can tell before hand if the power supply that you have will supply enough power ie amps & watts at 12v DC.
I have a few of them. Can you tell which one that would put out enought power.
Also is there a way to get 24V out of the PC power supply.
Thanks.

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02-06-2010 02:40 PM  8 years agoPost 13
TJinGuy

rrProfessor

Socorro, NM - USA

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Looking at the sticker on the side will tell you the PS's ratings.

No there is no way to get 24V out of a PC power supply. There are ways to put them in series for higher voltage output but that is way outside the scope of this discussion. Check out RCGroups for info on that.

- Chris

Team New Mexico
TJinTech

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02-06-2010 03:10 PM  8 years agoPost 14
geink

rrApprentice

nova scotia, Canada

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Hi,
With that new 1000 watt charger that is just out,would it be possable to put those power supplys in paralell--2,3,4 or whatever.
Thanks.

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02-06-2010 04:18 PM  8 years agoPost 15
TJinGuy

rrProfessor

Socorro, NM - USA

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Technically yes. Practically maybe. It would depend on a few things and there might be a few hiccups but basically yes.

- Chris

Team New Mexico
TJinTech

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02-11-2010 08:14 PM  8 years agoPost 16
Wamp

rrNovice

E Berne NY USA

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WHat I should have done was put a fuse in line.
All was up just fine. The on off switch is nice to have, untill it get's switched on when the leads are touching. Nice bright flash on the board, no were near the fuse. Woops! Looking around for another old pc. Chris

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02-16-2010 09:00 AM  8 years agoPost 17
aristo1963

rrApprentice

goldsboro nc usa

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Get this for 10.00 bucks http://www.trademoon.com/Product58670.aspx

then http://helistamagazine.com/forum%20...php?f=27&t=1926 to set it up.I have 2 in series at 12v and 24v outputs,they are 55 amps 800watts each.They will make the house lights flicker at startup due to the inrush current lol.

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02-25-2010 01:18 AM  8 years agoPost 18
landerw

rrNovice

Maracaibo, Venezuela

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If all cable is the same color, how know with is the green cable for turn on

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03-22-2010 03:32 AM  8 years agoPost 19
Wamp

rrNovice

E Berne NY USA

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PCs towers used to be stacked up for recycle all the time.
Now; I guess lap tops and fancy cell phones put an end to that.
I did find a supply that does 3.5 amps on the 12V out put.
Cipes! it came from a smoker, how do you get that smell out?
It does a fine job with the small bats I use, even thoe my charger calls for 4 amps.
I did not bother to fuse it.
I did locate the 5V load resisters externally attached to a heat sink.
Now I wonder how will a brushless 12 V fan run on 5 Vs.
I'm glad not to be tied to a car bat! Chris

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03-26-2010 06:33 PM  8 years agoPost 20
blackbird

rrVeteran

thessaloniki-Greece

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I want to ask about a 550W pc power supply that i bought today, while i was charging 3x6s in parallel at 7.9A sudenly stops working and don't work again after that.Everything inside looks ok not smelling nothing.Any thought's ?
Thank you.

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