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I have a liitle sturdier setup. I xhopped the socket off a 12v cigarette lighter extension cord. It's only 16-gauge wire, so it effectively acts as a resustor for high draws. I do also use a West Mountain Radio battery isolator, which is nice because it protects
both the starting and auxiliary batteries from over-discharge.
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<div>Andrew, KA2DDO </div>
<div>author of YAAC ("Yet Another APRS Client")</div>
<div>http://www.ka2ddo.org/ka2ddo/YAAC.html</div>
<div>member, Chester County (PA) ARES/RACES </div>
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-------- Original message --------<br>
From: Bill Vodall via aprssig <aprssig@tapr.org> <br>
Date: 08/12/2015 2:02 PM (GMT-05:00) <br>
To: TAPR APRS Mailing List <aprssig@tapr.org> <br>
Subject: Re: [aprssig] Mobile Off-Air Display <br>
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<div class="PlainText">>. Basically, we connect to car power<br>
> through a one ohm resistor. It basically makes high current draws come from<br>
> the battery instead of the car, but allowing the car power to keep the battery topped.<br>
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I'm done something similar but using a 12V bulb instead of a resister.<br>
It limits the current flow to a fixed amount and provides a visual<br>
indicator of charging. I believe it requires a supplemental smart<br>
charging circuit to properly top off and cycle the battery to maintain<br>
good battery health.<br>
<br>
Bill<br>
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