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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> Where to get a cheap 12v power supply?
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Where to get a cheap 12v power supply? - 5/19/2008 11:20:26 PM   
gaRCfield


 

Posts: 1256
Joined: 5/20/2008
From: Burlington, VT, USA
Status: online 		I know they're out there!

I couldn't find a computer power supply with enough amperage to make one. Radio shack here is stoopidly expensive.

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RE: Where to get a cheap 12v power supply? - 5/19/2008 11:31:56 PM   
guver


 

Posts: 8968
Joined: 3/7/2003
From: LaGrange, OH, USA
Status: offline 		There should be many on e-bay and for your batts , even an old one for free should do a nice job. I got a couple of old clunkers that my computer guy gave me for free and they both do about half of what the rating (200watt) is 80-100 watts.

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RE: Where to get a cheap 12v power supply? - 5/19/2008 11:37:15 PM   
SavageX78



Posts: 1157
Joined: 2/26/2007
From: Laconia, NH, USA
Status: offline 		How much amperage do you need? A pc power supply should do it.

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RE: Where to get a cheap 12v power supply? - 5/19/2008 11:44:50 PM   
gaRCfield


 

Posts: 1256
Joined: 5/20/2008
From: Burlington, VT, USA
Status: online 		I saw this on the website:

This is a Compact Switching 12V, 7A Power Supply.
***********This item can NOT be used as a power supply for the************ ********* Great Planes TRITON series or the DuraTrax ICE charger ************ ********* It does not meet these chargers' current requirements **************

Doesn't this mean I need more than 7A???

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RE: Where to get a cheap 12v power supply? - 5/20/2008 1:18:10 AM   
guver


 

Posts: 8968
Joined: 3/7/2003
From: LaGrange, OH, USA
Status: offline 		No, you will only need about 3-4 amps.

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RE: Where to get a cheap 12v power supply? - 5/20/2008 2:33:40 AM   
gaRCfield


 

Posts: 1256
Joined: 5/20/2008
From: Burlington, VT, USA
Status: online 		thanks.

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RE: Where to get a cheap 12v power supply? - 5/20/2008 3:50:36 AM   
RevToTheRedline



Posts: 1044
Joined: 7/6/2004
From: Rainsville, AL, USA
Status: offline 		guver you are incorrect, these chargers are 12v DC, the whole system is DC, if the charger is 7A it needs at least a 7A power supply, if its a 10A charger it needs more than 10A.

And that's granted if the charger is 100% efficient which it's doubtful there is one in existence. If you have an Ice I'd recommend getting a 15A power supply, my recommendation would be a Pyramid PSV200 it's a nice $50 20A, I have the 30A model it's been great.

Also original poster I'm not sure what you meant by you couldn't find a computer power supply with enough amperage, before I got my Pyramid 30A I ran an old Antec 350w power supply (low wattage by todays computing standards) and it was rated at 12v 18A which would be MORE than enough to power an Ice.

< Message edited by RevToTheRedline -- 5/20/2008 3:56:20 AM >

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RE: Where to get a cheap 12v power supply? - 5/20/2008 4:29:48 AM   
gaRCfield


 

Posts: 1256
Joined: 5/20/2008
From: Burlington, VT, USA
Status: online 		I just found a pile of used computer power supplies and looked at the outputs - they were like 5v/1.5a, 12v/3a, etc.

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RE: Where to get a cheap 12v power supply? - 5/20/2008 4:40:50 AM   
guver


 

Posts: 8968
Joined: 3/7/2003
From: LaGrange, OH, USA
Status: offline 		The power requirement must be figured in total power (watts) and the only time the current required matches the current delivered is when the input and output voltage is the same (chargeing an 8 cell NI or 3S lipo)

If a charger is charging a 4 volt battery at 7 amps it only needs less than 3 amps supplied by a 12 volt ps , yet if it happens to be chargeing a 40 volt battery then it'll need over 20 amps suplied by a 12 volt ps.

We really haven't mentioned a specific charger, but in the case of an ice charger the same holds true. The power input is determined by the power output or the specific chargeing job you are doing.

< Message edited by guver -- 5/20/2008 2:59:59 PM >

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RE: Where to get a cheap 12v power supply? - 5/20/2008 1:34:48 PM   
Red Scholefield



Posts: 4974
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline 		A good power supply source is http://buyreliant.com/psupplies/pyramid_power_supplies.htm

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RE: Where to get a cheap 12v power supply? - 5/24/2008 5:05:15 AM   
bluemagic98



Posts: 848
Joined: 7/25/2004
From: Wisconsin Rapids, WI, USA
Status: offline 		http://www.newegg.com/Product/Product.aspx?Item=N82E16817709011 12V@25A $19.99 there are a zillion p/c supplies that produce huge power these days However the pyrmid supplies are regulated @ 13.8 volts tweeking a pc supply to get over 12v can involve a little soldering some p/c supplies can output 11.8v without a 10 watt resistor wired into the 5v circuit.

http://web2.murraystate.edu/andy.batts/ps/powersupply.htm

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RE: Where to get a cheap 12v power supply? - 5/26/2008 12:31:34 PM   
wswanepoel


 

Posts: 97
Joined: 6/28/2007
From: FintasKuwait, KUWAIT
Status: offline 		Depending on what you call cheap. Look at this one if you dont want to build one from a computer power supply.

http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=6879&Product_Name=16A_14v_DC_Power_Supply_for_Chargers&cda=36317

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RE: Where to get a cheap 12v power supply? - 5/27/2008 5:01:10 AM   
rhk


 

Posts: 38
Joined: 7/18/2003
From: mumbai, INDIA
Status: offline 		Got a 12 v power supply from Fry's.com. has a 3amp output. I use it along with a hobbico quick field charger, and so far no issues. Costs $ 40. Hope this helps.

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