Running computer from vehicle's electrical system.

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Article #6979

#6979

From: Kyler Laird
Date: Mon, 31 Aug 1992 15:34

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I was just reading the thread about running a computer from a
car battery, and I realized that I need help doing the same, but
this time, the battery is in the vehicle (a tractor).

How simple is it to filter out spikes and sags?  I was thinking
of limiting the power supply to a 15V Zener diode, 12V regulator,
"large" capacitor, and switching diode (to keep capacitor from
draining back into the tractor's electrical system).

My background is primarily in digital electronics, so I need help.
Is a more complex circuit needed?  I'm not too interested in
efficiency; most of the circuit will be shut down with the engine,
and draining the battery a bit will not be a big problem.

The circuit I'm powering is a 68HC11EVB and Zenith laptop.  The
EVB needs +12V only, and the Zenith takes +16.5V, but I suspect
that it will run on +12V.

Thanks for the help!

--kyler

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From: laird@stable.ecn.purdue.edu (Kyler Laird)
Newsgroups: sci.electronics
Subject: Running computer from vehicle's electrical system.
Message-ID: <laird.715275288@stable.ecn.purdue.edu>
Date: 31 Aug 92 15:34:48 GMT
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Organization: Purdue University Engineering Computer Network
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