How to convert an ATX power supply to rc use
#253
Member
Join Date: Aug 2006
Location: Sellersburg,
IN
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
RE: How to convert an ATX power supply to rc use
No good... I have black and green together... I have red to one side of the resistor and black to the other. I have all the yellow grouped together and comboned at teh end, I have done the same for the black... I have capped off every other wire so they are not connected or touching. I plug it in and the fan moves a bit and stops. I can keep it plugged in and take the green and the black wire and tap them together and it will light and spin for a second and stop and many times as I touch them together. nothing.... just spent another 14 bucks
any ideas?
any ideas?
#254
RE: How to convert an ATX power supply to rc use
ORIGINAL: myrddin
I dont have the resister... you think that is why? ... <snip> .....Only sense wire I have is the green power good one... I have the gray one but I do not think I needit unless I hook up an led. I will get the resister and see.
I dont have the resister... you think that is why? ... <snip> .....Only sense wire I have is the green power good one... I have the gray one but I do not think I needit unless I hook up an led. I will get the resister and see.
Fan bumps are fairly common. I'm attaching a pdf file I send out to folks that covers some of the causes with solutions.
andrew
[link=http://web2.murraystate.edu/andy.batts/ps/POWERSUPPLY.HTM]Power Supply Conversion[/link]
#255
Member
Join Date: Aug 2006
Location: Sellersburg,
IN
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
RE: How to convert an ATX power supply to rc use
I have checked to be sure but there are no sense wires, only the green which I have connected to a black. I do now have a 10/10 resister on a red/black. it will not do anything... reading your PDF now.
#256
Member
Join Date: Aug 2006
Location: Sellersburg,
IN
Posts: 46
Likes: 0
Received 0 Likes
on
0 Posts
RE: How to convert an ATX power supply to rc use
OK, I disconnected all the wires. I checked each for continuity... All was good... I plugged it in and then tested the yellow and black it beeps so that tells me its a short to ground but only when there is power? not sure if that is right.
#257
Senior Member
Join Date: Jun 2009
Location: Litchfield Park,
AZ
Posts: 831
Likes: 0
Received 0 Likes
on
0 Posts
RE: How to convert an ATX power supply to rc use
Can anyone tell me how I blew the little glass fuse? Red, Yellow, Orange and Black wires all bundle and soldered to separate posts. Blue, Grey and Purple snipped short and shrink wrapped separately. 1 Red and 1 Black connected to opposite ends of 10w/10ohm resistor. The only Green and 1 Black for power on. As soon as I turned on the PS the fuse popped. Any help would be greatly appreciated now that I've destroyed this PS.
Below is a picture of the unit. You can see just about everything.
http://www.rcuniverse.com/gallery/ga...berID%3D479503
BTW how do you get pictures to show up on the post without using a link like this. I've hit the image button but nothing.
Below is a picture of the unit. You can see just about everything.
http://www.rcuniverse.com/gallery/ga...berID%3D479503
BTW how do you get pictures to show up on the post without using a link like this. I've hit the image button but nothing.
#259
Senior Member
Join Date: Jun 2009
Location: Litchfield Park,
AZ
Posts: 831
Likes: 0
Received 0 Likes
on
0 Posts
RE: How to convert an ATX power supply to rc use
UPDATE: I took the case apart and found the ground cables had come loose and were probably touching the case. Could this be why the fuze popped? If so can I replace that fuze or is the PS junk?
#260
RE: How to convert an ATX power supply to rc use
ORIGINAL: jrowles91
UPDATE: I took the case apart and found the ground cables had come loose and were probably touching the case. Could this be why the fuze popped? If so can I replace that fuze or is the PS junk?
UPDATE: I took the case apart and found the ground cables had come loose and were probably touching the case. Could this be why the fuze popped? If so can I replace that fuze or is the PS junk?
However, in one of the photos, the lead from the resistor appeared to be touching the heat sink - that may have also caused the fuse to blow. These leads should be covered either with heatshrink or a piece of insulation from some 16 to 18 ga. wire and should not come into contact with any part of the PSU. On many supplies, these heatsinks are hot and you can get an AC jolt if you touch the sink and case at the same time [X(].
The fuses are replaceable - yours appears to be soldered in. When you get it out, check the rating on the metal ends and replace with an equivalent fuse.
andrew
#261
Senior Member
Join Date: Jun 2009
Location: Litchfield Park,
AZ
Posts: 831
Likes: 0
Received 0 Likes
on
0 Posts
RE: How to convert an ATX power supply to rc use
Ok so move the resistor and cover the leads completely (btw the leads are NOT touching the heatsink), replace the fuse and it should operate? From what you can see and what I explained, the wiring seems correct? Also yes the ground could have been laying on the 3.3v or 12v connector also, just not sure.
#263
RE: How to convert an ATX power supply to rc use
Maybe I'm missing something here, but the power supplies that I have laying around have all the yellow, red and black wires soldered to the same location on the mother board.
This would tell me that I dont need to solder all the yellow, red and black wires together. Just cut all but 1 wire for each color and run to a jack.....
I did read somewhere on another post and forum that you will increase the amp output by paralleling the 12 and 5V outputs.
If they all go to the same location on the mother board paralleling the wires will do nothing.
Larry
This would tell me that I dont need to solder all the yellow, red and black wires together. Just cut all but 1 wire for each color and run to a jack.....
I did read somewhere on another post and forum that you will increase the amp output by paralleling the 12 and 5V outputs.
If they all go to the same location on the mother board paralleling the wires will do nothing.
Larry
#264
RE: How to convert an ATX power supply to rc use
ORIGINAL: lbarnes
If they all go to the same location on the mother board paralleling the wires will do nothing.
If they all go to the same location on the mother board paralleling the wires will do nothing.
If you want to pull a continuous high amperage current on 18 AWG, feel free. Most folks double up just to improve current transfer.
andrew
#265
RE: How to convert an ATX power supply to rc use
I respect that.
If your going to pull max amps then yes the bigger the wire the better.
But I have seen it posted on some BBS the if one yellow wire is 10 Amps the 4, yellow wires soldered together are 40 Amps...[:-]
Since the output is posted on the side of most power supplies, that should be the MAX you can draw.
Just my $.02 worth...
Larry
If your going to pull max amps then yes the bigger the wire the better.
But I have seen it posted on some BBS the if one yellow wire is 10 Amps the 4, yellow wires soldered together are 40 Amps...[:-]
Since the output is posted on the side of most power supplies, that should be the MAX you can draw.
Just my $.02 worth...
Larry
#266
RE: How to convert an ATX power supply to rc use
ORIGINAL: lbarnes
But I have seen it posted on some BBS the if one yellow wire is 10 Amps the 4, yellow wires soldered together are 40 Amps...[:-]
But I have seen it posted on some BBS the if one yellow wire is 10 Amps the 4, yellow wires soldered together are 40 Amps...[:-]
ORIGINAL: lbarnes
Since the output is posted on the side of most power supplies, that should be the MAX you can draw.
Since the output is posted on the side of most power supplies, that should be the MAX you can draw.
andrew
#267
Junior Member
Join Date: Feb 2011
Location: , VT
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
RE: How to convert an ATX power supply to rc use
Is there anyone that would be willing to build we a power supply?. Im running Turnigy 30-40c discharge 4s packs. Would like the option of charging at 4c but will probably do 3c to be safe. I have a iCharger 208B which is 20a/350w max. I am capable of building the power supply myself but would rather not. If someone is willing I would like this done but only with a decent power supply (not a 30 dollar psu for example) an Antec, Cooler Master or something along those lines. Any help would be appreciated.
#268
RE: How to convert an ATX power supply to rc use
Why not go on Ebay and look for the mainframe power supplies. You can find them for about $50.00. They are rated at 12V, 50A.
Our club purchased 2 of them last year for our field charging station.
Larry
Our club purchased 2 of them last year for our field charging station.
Larry
#269
Junior Member
Join Date: Feb 2011
Location: , VT
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
RE: How to convert an ATX power supply to rc use
ORIGINAL: lbarnes
Why not go on Ebay and look for the mainframe power supplies. You can find them for about $50.00. They are rated at 12V, 50A.
Our club purchased 2 of them last year for our field charging station.
Larry
Why not go on Ebay and look for the mainframe power supplies. You can find them for about $50.00. They are rated at 12V, 50A.
Our club purchased 2 of them last year for our field charging station.
Larry
I would still need to open it and convert so I could use it wouldnt I?.
#270
RE: How to convert an ATX power supply to rc use
No conversion needed. you just hook up the wires to the output terminals and you good to go..
Your thinking of a personnel computer power supply.
This one is a 30A 12V switching power supply, but bigger ones are available.
http://cgi.ebay.com/Regulated-Switch...item483dbb2f8a
Larry
Your thinking of a personnel computer power supply.
This one is a 30A 12V switching power supply, but bigger ones are available.
http://cgi.ebay.com/Regulated-Switch...item483dbb2f8a
Larry
#272
RE: How to convert an ATX power supply to rc use
Well, click on the Ebay link in the last post and then you can go to the category (dc power supplies) that will get you into the proper page. Do a search for 12 V power supplies and you will see the listings.
Or if that power supply is going to work for you, just buy it
Larry
Or if that power supply is going to work for you, just buy it
Larry
#273
Junior Member
Join Date: Feb 2011
Location: , VT
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
RE: How to convert an ATX power supply to rc use
ok so between the one you showed me and this one
Which would you recommend?
#274
RE: How to convert an ATX power supply to rc use
It's up to you. Either one would work. The one you found is about $3 cheaper in price.
I cant tell if one is better than the other by manufacture. Just about everything is made in China now a days....
You may want to ask about the warranty...
We have not had any issues with the 2 we bought last year, but I could not find them on Ebay. I guess the 50A are all gone.
Larry
I cant tell if one is better than the other by manufacture. Just about everything is made in China now a days....
You may want to ask about the warranty...
We have not had any issues with the 2 we bought last year, but I could not find them on Ebay. I guess the 50A are all gone.
Larry
#275
My Feedback: (13)
Join Date: Dec 2001
Location: Prior Lake,
MN
Posts: 1,380
Likes: 0
Received 0 Likes
on
0 Posts
RE: How to convert an ATX power supply to rc use
Try this one. A little higher price, but you are guaranteed that it is manufactured, and carries the Meanwell brand name. This is the one I use, and I use my computer power supply that I built as a back up. Some of the converted computer power supplies will make some chargers get a false peak, and terminates the charge prematurely.
If you get one of these, make sure you select 120V, on the AC input voltage switch. I also replaced the cheap two wire cord that is supplied, with a 3 wire cord.
http://cgi.ebay.com/12V-DC-29A-350W-...item19c31eb598
Greg
If you get one of these, make sure you select 120V, on the AC input voltage switch. I also replaced the cheap two wire cord that is supplied, with a 3 wire cord.
http://cgi.ebay.com/12V-DC-29A-350W-...item19c31eb598
Greg