12-14V power supply questions.

DJNUBZ · 10th January 2005, 09:23 PM

I am looking into building a powersupply for testing car amps. I need to supply 14.4V but at upto 80-100amps. Do I just use a large 12v Toroid with a lot of capacitance or is there something else I should be considering.

AndrewT · 10th January 2005, 10:26 PM

Hi,
instead of large caps try a large lead/acid battery.
It will give good DC even with high charging pulses.
regards Andrew T.

Stocker · 10th January 2005, 11:37 PM

If all you want is short (relatively anyway) playtimes a battery (or multiple battery) setup is fine. You still need a charger, and the voltage will be constantly dropping. If you have the $$ and the inclination, a big transformer and monstrous caps will play as long as you please. Either will work.

Post photos when you finish though!

10th January 2005, 09:23 PM	#1
DJNUBZ diyAudio Member Join Date: May 2003 Location: Chicago	12-14V power supply questions. I am looking into building a powersupply for testing car amps. I need to supply 14.4V but at upto 80-100amps. Do I just use a large 12v Toroid with a lot of capacitance or is there something else I should be considering. __________________ http://www.caraudioconnoisseur.com/

10th January 2005, 11:37 PM	#3
Stocker diyAudio Member Join Date: Dec 2003 Location: Austin	If all you want is short (relatively anyway) playtimes a battery (or multiple battery) setup is fine. You still need a charger, and the voltage will be constantly dropping. If you have the $$ and the inclination, a big transformer and monstrous caps will play as long as you please. Either will work. Post photos when you finish though! __________________ Jesus loves you.

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10th January 2005, 10:26 PM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Hi, instead of large caps try a large lead/acid battery. It will give good DC even with high charging pulses. regards Andrew T.

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