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[aprssig] Suggestions for Automatic Power Off/Power On circuit for mobile rigs?

J. Gary Bender, WS5N WS5N at mindspring.com
Wed Nov 16 00:00:59 UTC 2005


I use a gizmo called a "ChargeGuard" that works like a charm.  Found it on eBay 
last year.  Senses when the engine is running and disconnects power about 15 
minutes after the engine is shut off.  Has an override button to give you 15 
minute chunks of power if you want to run while the engine is shut off.  Mine 
was a "recovered" used one.  Not the newest version.
--
J. Gary Bender, WS5N
Tijeras, New Mexico  USA


On Tue, 15 Nov 2005 14:16:12 -0500, Rich Mulvey wrote:
>
> Does anyone have any suggestions for an automatic power off
> circuit, for a mobile rig?
>
> I'm installing my FT-8500 in my trunk, and would like to be able to
> have the rig power off after, say, 10 minutes, and power on when
> the car is started.
>
> Having it power on is easy enough - I'm just going to insert a
> relay into the cigarette lighter line that energizes the power
> lines that I've passed conveniently next to it.  -)  But I'd also
> like the rig to have a delayed power off, so that it can get one
> last posit out.
>
> I'd also like to have my GPS powered off, as well, since it draws
> about 100ma, and I'd like to keep battery drain to an absolute
> minimum, especially when it's -30 degrees out.  Therefore, using
> the rig's built-in APO is possible, but that doesn't help me with
> the GPS.
>
> I've seen the APO2 at http://www.aprsworld.com/apo/ , and I'll
> probably breadboard one up, but I'm interested in other solutions,
> as well.
>
> - Rich
>
>
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