[aprssig] Mobile Off-Air Display

Bill Vodall wa7nwp at gmail.com
Wed Aug 12 13:02:13 CDT 2015


>. 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.

Bill


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