[aprssig] Mobile Off-Air Display

Andrew P. andrewemt at hotmail.com
Wed Aug 12 13:15:47 CDT 2015

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.
Andrew, KA2DDO author of YAAC  ("Yet Another APRS Client")http://www.ka2ddo.org/ka2ddo/YAAC.htmlmember, Chester County (PA) ARES/RACES

-------- Original message --------
From: Bill Vodall via aprssig <aprssig at tapr.org>
Date: 08/12/2015  2:02 PM  (GMT-05:00)
To: TAPR APRS Mailing List <aprssig at tapr.org>
Subject: Re: [aprssig] Mobile Off-Air Display

>. Basically, we connect to car power
> through a one ohm resistor. It basically makes high current draws come from
> the battery instead of the car, but allowing the car power to keep the battery topped.

I'm done something similar but using a 12V bulb instead of a resister.
It limits the current flow to a fixed amount and provides a visual
indicator of charging.   I believe it requires a supplemental smart
charging circuit to properly top off and cycle the battery to maintain
good battery health.

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