Using transformer to power charger? Is this Possible?  
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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> Using transformer to power charger? Is this Possible?
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Using transformer to power charger? Is this Possible? - 5/21/2003 5:48:56 PM   
Xhilr8


 

Posts: 27
Joined: 5/2/2003
From: Sydney, AUSTRALIA
Status: offline 		OKay, here's the deal....I'm from AUstralia and the prices here are quite high compared to the states...I want to purchase a new 12V DC Ni-cd/nimh charger from the states. I was wondering if I can use my 12V transformer from home to power any 12V DC battery charger? I dont' want to have to keep hooking it up to my car battery just to charge up.

Is this possible? Or does my transformer need to be of a specific specifications?
       Post #: 1

Using transformer to power charger? Is this Possible? - 5/21/2003 7:09:32 PM   
Steve Lewin


 

Posts: 904
Joined: 3/18/2002
From: Reading, UNITED KINGDOM
Status: offline 		You need a 12-14V DC power supply to power a charger. A transformer just converts AC to AC. That's not the same thing at all and it won't work.

Steve

(in reply to Xhilr8)
       Post #: 2

Using transformer to power charger? Is this Possible? - 5/21/2003 7:15:58 PM   
Xhilr8


 

Posts: 27
Joined: 5/2/2003
From: Sydney, AUSTRALIA
Status: offline 		No, I have a transformer that converts AC to 12V DC. So will this work and will my transformer need to have a specific amp output?

(in reply to Xhilr8)
       Post #: 3

Using transformer to power charger? Is this Possible? - 5/21/2003 7:59:05 PM   
mjd3



Posts: 174
Joined: 4/24/2003
From: Carmel, NY, USA
Status: offline 		This will work nicely with a 12VDC input.

http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXCTZ5&P=0

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Michael

(in reply to Xhilr8)
       Post #: 4

Using transformer to power charger? Is this Possible? - 5/21/2003 8:04:55 PM   
Xhilr8


 

Posts: 27
Joined: 5/2/2003
From: Sydney, AUSTRALIA
Status: offline 		Thanks mjd3

Does that mean ALL 12V chargers will work on any 12V power supply??.

(in reply to Xhilr8)
       Post #: 5

Using transformer to power charger? Is this Possible? - 5/21/2003 11:11:26 PM   
jacs



Posts: 394
Joined: 1/27/2003
From: Uddevalla, SWEDEN
Status: offline 		Maybe, but the problem is that your charger might want 5A when charging and power supply only can deliver 2A. Then you have a problem. I have one charger with 12V 1.5A when I slow charge and one computer supply 12V 8A when I fast charge.

Hope this info might help you


_____________________________

Jacs

(in reply to Xhilr8)
       Post #: 6

Using transformer to power charger? Is this Possible? - 5/23/2003 5:10:50 AM   
sport10


 

Posts: 715
Joined: 12/31/2001
From: Loxley, AL, USA
Status: offline 		You would want to have a power supply or transformer that produces a clean 12v-14v output with at least 6 to 7 amp capacity. If the transformer output is dirty you might have to put a capactitor in parallel to help smooth the DC out. The best way to view the output is with a Oscilloscope. A multimeter will not tell you nothing about the cleaniess of the power output.

(in reply to Xhilr8)
       Post #: 7

Using transformer to power charger? Is this Possible? - 5/23/2003 5:17:28 AM   
Xhilr8


 

Posts: 27
Joined: 5/2/2003
From: Sydney, AUSTRALIA
Status: offline 		Just wanted to take the time to thank you guys for replying to my questions. I've purchased a charger in kit form from my local electronics store and will have a shot at building it. I've already accidentely broken one of the legs off the IC sockets (damn those things are so fragile)...Seems like a good charger for me. Charges up to 4.5 amps and charges, Li=ion, ni-cd, ni-mah as well as SLA (sealed lead acid) batteries. Also has a built in discharger.... it says the discharger is for Ni-Cad only..can't I also use it for my Ni-mh or will it be bad for my batterries??

will let you guys know how it goes.

(in reply to Xhilr8)
       Post #: 8

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