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From: shirriff@sprite.berkeley.edu (Ken Shirriff)
Newsgroups: sci.electronics
Subject: Re: RS-232 powered modems
Message-ID: <10367@pasteur.Berkeley.EDU>
Date: 21 Jan 91 22:09:03 GMT
References: <19983@hydra.gatech.EDU> <1991Jan21.025151.6524@zoo.toronto.edu> <6128@healey>
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In some article, someone writes:
>:It is possible to pull a small amount of power from the phone lines, but
>:this has to be done very carefully.

"The Art of Electronics" (Horowitz and Hill) describes in detail how much
power can be extracted from phone lines, how to do it, and how to design
low-power circuits in general.

And, to kill two birds with one stone, here's my book review:
I just got "The Art of Electronics" (2nd ed.) on the net's recommendation.
It's crammed full of useful information and is interesting to read.  It
covers nearly everything (e.g. transistors, op amps, digital, computer
interfacing, amplifiers, high frequency, low power, measurement, high
accuracy)  It's low on theory and concentrates on practical circuits,
advice, and techniques.  It moves too quickly to be an introductory book,
but would be great for anyone else.  I give it a thumbs up, even though
it's expensive ($50).

Ken Shirriff			shirriff@sprite.Berkeley.EDU