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120VAC to 12VDC converter???

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120VAC to 12VDC converter???

Old 03-24-2005, 08:53 PM
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DLSmith2
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Default 120VAC to 12VDC converter???

Howdy!

Just got some Lipos and a Triton charger; the problem is I want to charge them at home without using the car battery. Radio Shack was recommended to look for a 120VAC to 12VDV converter, but the folks working there knew even less about it than I did. What is a good way to safely charge at home, and with which converter?

Thanks!

Blue skies,

DL
Old 03-24-2005, 09:44 PM
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Default RE: 120VAC to 12VDC converter???

hate to say it, but in general, converters arent the way to go. A battery puts out a nice steady stream of energy that makes a charger happy A converter puts out a current woth small pulses in it (a result of the imperfect gadget that transforms AC to DC) that can hurt a charger. The best way to go in my opinion, go to the auto parts store and buy a cheap 12v motorcycle battery(about $20) then go to your hobby shop, and buy a 12v wall charger for the battery (about $10) and youre all set. Charge up the 12v battery with the wall charger, then hook up the triton.
I hear that if you hook up the power supply to the battery, and the charger, the battery will smooth out the pulses coming from the charger.
Also, have heard that you can use an old computer power supply....

Hope that helps
Old 03-24-2005, 10:07 PM
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Default RE: 120VAC to 12VDC converter???

Do a google search on pyramid power supply and look for someone that has the 14 amp one (or less, I like bigger so less load or have 3 chargers running on it!) for around 40ish bucks and be done with it. Excellent quality, quiet and you don't have to do anything yourself like the PC power supply mods...

Radio Shack even has a 12V power supply, I think a small 4 amp one and a larger 10ampish one.. they're more expensive than the pyramid though.
Old 03-24-2005, 10:47 PM
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Default RE: 120VAC to 12VDC converter???

Thanks for the replies! I think I'm going to charge up a trolling motor battery I have already and see how it works before I go the converter route.

Thanks again for the help!

Blue skies,

DL
Old 03-25-2005, 07:01 AM
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Red Scholefield
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Default RE: 120VAC to 12VDC converter???

The use of 12 volt power supplies for charging at home is wide spread. Power supplies have filtering circuits that make them pure DC for our R/C charger purposes. There outputs are constant rather than tappering off as you would find in using a 12 volt battery. A good power supply should last you forever unlike a 12 volt battery that you have to replace occasionally. There are no gases emitted, or liquid to spill as there are with battery.

Here are three on line sources at good prices.

http://www.efunctional.com/new-pyram...-supplies.html

http://www.millionbuy.com/caudio-kit-sup.html

http://www.buyreliant.com/psupplies/...r_supplies.htm

You will want one that puts out 7 amps or more.
Old 03-25-2005, 08:09 AM
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Default RE: 120VAC to 12VDC converter???

Or you can convert a PC power supply
Old 03-25-2005, 11:13 AM
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Default RE: 120VAC to 12VDC converter???


ORIGINAL: exeter_acres

Or you can convert a PC power supply
Yes, very easily - done by many. But it may be beyond the capability of some that have a problem determining which end of a soldering iron is hot.
Old 03-25-2005, 11:18 AM
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Default RE: 120VAC to 12VDC converter???




Very good point!

I think I'm still trying to figure it out on some mornings!
Old 03-25-2005, 12:56 PM
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Default RE: 120VAC to 12VDC converter???

Red , Thanks for the info on the Pyramid power supply, the prices are excellent.
I have a Radio shack 10 amp that I purchased on clearance for $39 and their 25 amp switching power supply that was on sale for $59.

Are there any problems using a switching power supply? My 10 amp power supply is much bulkier than the 25 amp.
Everyone seems to recommend 13 amp minimum for their charger but I would assume as in the case of the Triton you would only need the 13 amps if you were charging 24 cells.

Thanks

Wood Duck
Old 03-25-2005, 03:09 PM
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Default RE: 120VAC to 12VDC converter???


ORIGINAL: woodduck-RCU

Red , Thanks for the info on the Pyramid power supply, the prices are excellent.
I have a Radio shack 10 amp that I purchased on clearance for $39 and their 25 amp switching power supply that was on sale for $59.

Are there any problems using a switching power supply?

None that I know of. I'm using one I bought on e-bay for practically peanuts.

My 10 amp power supply is much bulkier than the 25 amp.
Everyone seems to recommend 13 amp minimum for their charger but I would assume as in the case of the Triton you would only need the 13 amps if you were charging 24 cells.

Right, I'm running up to 4 chargers from a single converted PC power supply with 9 amp capability. Consider that when you are charging at home on the bench do you really need to abuse the battery with high charge rates to fast charge them?
Thanks

Wood Duck
Old 03-26-2005, 02:43 PM
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Default RE: 120VAC to 12VDC converter???

So if I were to go with say a 12 amp Pyramid power supply and the Triton.....is there any other items I would need? Any other cords, accessories to be set to go?

Thanks in advance.
Old 03-26-2005, 03:17 PM
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Default RE: 120VAC to 12VDC converter???


ORIGINAL: Harleyflyer

So if I were to go with say a 12 amp Pyramid power supply and the Triton.....is there any other items I would need? Any other cords, accessories to be set to go?

Thanks in advance.
A pair of banana plugs to replace the big aligator clips on the Triton. Then get a cigarette lighter plug at Radio Shack and a foot of # 16 wire with 5/32 brass tubes about 1" long that will accept the banana plugs. Put some heat shrink over the brass tubing after you solder the wires so that it cannot short out.

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Old 03-26-2005, 03:43 PM
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Default RE: 120VAC to 12VDC converter???

Thanks for the input Red.....greatly appreciated.
Old 03-28-2005, 09:17 PM
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voodoo51
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Default RE: 120VAC to 12VDC converter???

I use the power supply from the mrc superbrain 969 pro it provides constant voltage.

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