12v 15amp power supply
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12v 15amp power supply

 
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rocketradio7



Joined: 16 May 2006
Posts: 3
Posted: Tue May 16, 2006 2:06 am    Post subject: 12v 15amp power supply Reply with quote
Would like to build a 12v 15 amp power supply. Can anyone tell me the best way to do it.

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neon



Joined: 25 Feb 2006
Posts: 594
Posted: Sat May 20, 2006 6:24 pm    Post subject: Reply with quote
For that kind of a load 15 amps you must ask yourself first is it going to be linear or a switcher. it will all depends on your application to begin with.
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rocketradio7



Joined: 16 May 2006
Posts: 3
Posted: Sun May 21, 2006 2:35 am    Post subject: 12 volt 15 amp dc power supply Reply with quote
I have a rc battery charger that is used in the field. I want to be able to use it inside.

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neon



Joined: 25 Feb 2006
Posts: 594
Posted: Sun May 21, 2006 5:31 pm    Post subject: Reply with quote
rc battery? i am sure that is a common name for you but not for me. what is it a battery to start a rocket? what the volts? what the amps? well anyhow the cheapest way for you to do that is use the internet and find PC power supplies i cannot remenber where but i found one that give you that power and more for only $20.00 it is a switcher but then i could not buy the parts to design it and biult it for that no way ever. and if you i believe that you want to regulate that power then use an LM317 with a bypass transistor. have fun
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rocketradio7



Joined: 16 May 2006
Posts: 3
Posted: Sun May 21, 2006 11:36 pm    Post subject: 12 v dc power supply Reply with quote
Sorry !

The charger is used on batteries for remote control cars,planes,etc. All different power levels. I did think about a pc power supply and your right that would be easy. But I still would like to build one myself.
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neon



Joined: 25 Feb 2006
Posts: 594
Posted: Thu May 25, 2006 10:48 pm    Post subject: Reply with quote
To charge battery you don't need a power supply any rectified DC will do.
Provided the source is current limited and the voltage is higher then the battery. If i was going to biuld this thing i would use a current source to charge the battery. Yoy say 15 amps that is a lot to charge a battery. if you charge at that rate pay attention to heat if the battery gets hot because of it the battery will not last long.
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