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- Path: sparky!uunet!gatech!purdue!mentor.cc.purdue.edu!noose.ecn.purdue.edu!stable.ecn.purdue.edu!laird
- 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
- Sender: news@noose.ecn.purdue.edu (USENET news)
- Organization: Purdue University Engineering Computer Network
- Lines: 21
-
- 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
-