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Old 30th August 2005, 09:45 PM   #1
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Default Need help with power supply, ~12v source: 9v, 5v, and 3.3v ouputs

I am trying to build a power supply to power some pro-audio gear in the car. I will probably use one of the many modified jung regulators for the 5v and the 9v, but what should i use for the 3.3v? There is quite a bit of ripple and noise comming from the alternator, so i will need a good pre-regulator. Should i just use one of the lm3940's i have lying around and feed it with the output of the 5v "jung" regulator? Any suggestions on any of the supplies would be useful. So to sum it up, i have the fluctuating car power to deal with say from 12v-15v and from there i need +9v, +5v, and +3.3v.
Thanks
Hans
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Old 31st August 2005, 09:07 PM   #2
Eva is offline Eva  Spain
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I may have what you want.

Check this post : http://www.diyaudio.com/forums/showt...494#post698494
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Old 2nd September 2005, 05:07 PM   #3
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Old 2nd September 2005, 06:19 PM   #4
Eva is offline Eva  Spain
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