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Re: Serial port power draw.

From: James Davidheiser <>
Date: Sun, 4 Mar 2001 22:36:59 -0500 (EST)

Doug,
   The questions were fuzzy I think because of entirely too many hours
spend in lab recently... Thanks for the info and links, I will be sure to
update everyone in a few days once my compnents are here and I (hopefully)
have this thing working.  I'll be sure to post schematics/source/etc up on
the web for all to use.

Speaking of putting things on the web, I am currently working on the
pocket tools review which I mentioned earlier.  Dr. Mann has give me a
place to host the reviews and as soon as I get everything written up I
will post a link to the list.

 On Sun, 4 Mar 2001, Doug Sutherland wrote:

> James,
>  
> > what I was asking was whether i was going to be able to use connection to
> > the serial port or to exactly that.
> 
> I'm still a bit fuzzy on what the question was. If you want to power the 
> PIC and the MAX232 from a PC serial port, it should be doable. But the 
> voltages will be somewhere around 10-12 volts, so you need regulation. 
> Perhaps this will help.
> 
> http://www.hut.fi/Misc/Electronics/circuits/rspower.html
> 
> Have fun debugging them assembly routines. I will never forget doing 
> long division on 370 assembler. 
> 
>   -- Doug
> 

James Davidheiser
Drexel University
Department of Physics

"Tell a man that there are 400 billion stars and he'll believe you"
"Say a bench has wet paint and he has to touch it"

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