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12 Volt transformer?

Old 03-30-2010, 04:20 PM
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Default 12 Volt transformer?

I'm trying to find a 12 Volt transformer on the Internet, but the options are endless.

What would be a good field transformer to buy?

I am looking for something to plug into my 110V Honda gas generator so I can charge A123 and LiPo's at the field using the various 12Volt chargers we all carry around.

Looking for something that will handle multiple chargers at the same time

thanks
Old 03-30-2010, 04:23 PM
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Default RE: 12 Volt transformer?

Hello:

Try use a computer power supply. I use one for my Shulze chamaleon charger.

Regards from Spain.

Carlos.
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Old 03-30-2010, 04:27 PM
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Default RE: 12 Volt transformer?

I converted an old PC power supply John, I think it cost me about $5 total. All I had to do was buy the banana plug jacks and a switch to turn it on and off. Very simple to do. The power supply was free. If you have some problems doing it let me know and I could probably whip something together for you.
Old 03-30-2010, 04:32 PM
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Default RE: 12 Volt transformer?

What you need to remember is 12v chargers need DC power, not AC as your generator would put out, so what you would really need is a regulated DC power supply. These are available in quite large sizes but tend to be expensive.

I fly electric as well as jets so I take an old car battery to the field for charging. The battery no longer has the balls to crank a car but there's a lot of life left in it to charge batteries. At home I charge from this battery & leave my 12V car battery charger connected to it.

Don't just use a common car battery charger by itself, they are usually not very well regulated & you could fry some of your electronics. The old battery acts as a buffer between the car battery charger & the model chargers & keeps things safe. - (also) John C.

Wow, that was quick! In the time it took me to type this you had a couple of answers already. Ain't this place great!
Old 03-30-2010, 04:53 PM
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Default RE: 12 Volt transformer?

John
This is what I use at the field. I used servo tape to hold the strip on the power suppy. It is a 29 amp power supply and the most chargers I've hooked up at one time was five.

http://www.commonsenserc.com/product...roducts_id=649

http://www.rcaccessory.com/12vdcpowerstrip.aspx

Last edited by bcovish; 06-07-2017 at 12:34 PM.
Old 03-30-2010, 04:54 PM
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Default RE: 12 Volt transformer?

Great idea with the PC power supply, I'll go scavenge my old PC in the garage.

Thanks
Old 03-30-2010, 04:55 PM
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Default RE: 12 Volt transformer?

This is a nice looking power supply. Temporarily out-of-stock though:

http://www.xtremepowersystems.net/pr...p?prod=eFuel30
Old 03-30-2010, 05:00 PM
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Default RE: 12 Volt transformer?

See the IOTA power supply at www.bvmjets.com

We use them to power all of our field chargers at the field and at home. They require AC current, so they are what you need.
They put out 13.4 Vdc at 55 amps. We usually run two Cellpro 10S chargers simultaneously.
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Old 03-30-2010, 05:06 PM
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Default RE: 12 Volt transformer?

Less money / less amps:

http://www.hobbypeople.net/gallery/158303.asp
Old 03-30-2010, 05:20 PM
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Default RE: 12 Volt transformer?

Here's the instructions I used for converting mine.

[link]http://web2.murraystate.edu/andy.batts/ps/powersupply.htm[/link]
Old 03-30-2010, 05:53 PM
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Default RE: 12 Volt transformer?


ORIGINAL: bcovish

John
This is what I use at the field. I used servo tape to hold the strip on the power suppy. It is a 29 amp power supply and the most chargers I've hooked up at one time was five.

http://www.commonsenserc.com/product...roducts_id=649

http://www.rcaccessory.com/12vdcpowerstrip.aspx

$43 shipped on flee bay....

http://cgi.ebay.com/12V-DC-29A-350W-...item5ad856e2af


Old 03-30-2010, 06:24 PM
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gruntled
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Default RE: 12 Volt transformer?

Yet another option:

http://www3.towerhobbies.com/cgi-bin...&I=LXWGU8&P=ML
Old 03-30-2010, 06:30 PM
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Default RE: 12 Volt transformer?

This is what I run

http://www.flyinggiants.com/forums/s...ad.php?t=12159
Old 03-30-2010, 06:54 PM
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Default RE: 12 Volt transformer?


ORIGINAL: RCISFUN


ORIGINAL: bcovish

John
This is what I use at the field. I used servo tape to hold the strip on the power suppy. It is a 29 amp power supply and the most chargers I've hooked up at one time was five.

http://www.commonsenserc.com/product...roducts_id=649

http://www.rcaccessory.com/12vdcpowerstrip.aspx

$43 shipped on flee bay....

http://cgi.ebay.com/12V-DC-29A-350W-...item5ad856e2af


Good find Rich
Old 03-31-2010, 12:22 AM
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Default RE: 12 Volt transformer?

How about a car battery and charge it of the 12v output from your generator.

BRG, Craig.
Old 03-31-2010, 04:49 AM
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Default RE: 12 Volt transformer?


ORIGINAL: RCISFUN
$43 shipped on flee bay....

http://cgi.ebay.com/12V-DC-29A-350W-...item5ad856e2af
Rich

Thanks for the link, just ordered two, for those in the UK the cost for two delivered was £54.47.

Mike
Old 04-01-2010, 08:13 PM
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Default RE: 12 Volt transformer?

Mike, when you get the power supplies, change out the fuse to a 25amp one. The one that comes with it are low amperage and if you put a bunch of chargers charging at high amperage, it will blow. I think the one that comes with it is a 10amp one.
Old 04-01-2010, 08:20 PM
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Default RE: 12 Volt transformer?

Radio Shack has a really good 15 amp power supply that I use. I have run as manny as 4 chargers off it at once an never had a problem. Think it is around $80 bucks.
Old 04-05-2010, 09:21 PM
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Default RE: 12 Volt transformer?

Here is a good bit of amps for the buck as well:

http://www.rcuniverse.com/market/item.cfm?itemId=621605

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