[Top] [All Lists]

Re: My Audio Buddy problem.

Subject: Re: My Audio Buddy problem.
From: "Rich Peet" <>
Date: Thu, 26 Aug 2004 14:27:57 -0000
--- In  "Rich Peet" <> 
> Well that is neat.
> >
> 20Preamps/AudioBuddy_PCBoard.jpg
> > Hope you see something interesting, Best, Rob D.

Looking at the photo more I don't understand why it will not work on 
dc.  You just need to supply the correct polarity at 2.5 volts over 
the output of those regulators.  The 4 digit number on the regulator 
chips will tell you the voltage out of them and just add 2.5 to 5.0 
volts.  I also don't see that it would hurt it to supply the wrong 
polarity other than to make it not work.

Are you sure you supplied the correct polarity when you tried it on 

Looks like a simple full wave bridge conversion from ac to dc. 
filtered with just 2 large caps on both the + and - sides. then the 
outputs of that go to the two regulators.




<Prev in Thread] Current Thread [Next in Thread>

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the naturerecordists mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU