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ZL3AI > APRDIG 16.08.06 05:50l 269 Lines 8314 Bytes #999 (0) @ WW
BID : 8574-ZL3AI
Read: GUEST
Subj: [APRSSIG] Vol 26 #13, 1/2
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From: ZL3AI@ZL2BAU.#87.NZL.OC
To : APRDIG@WW
Today's Topics:
1. Re: new software (Curt Mills)
2. Re: In car power solution for GPS 18 (Dale Blanchard)
3. RE: In car power solution for GPS 18 (Andrew Rich)
4. RE: In car power solution for GPS 18 (John Gleichweit)
5. Re: In car power solution for GPS 18 (Gregg Wonderly)
6. RE: In car power solution for GPS 18 (dave_at_aprsfl.net)
7. RE: In car power solution for GPS 18 (KENT HUFFORD)
8. RE: In car power solution for GPS 18 (Andrew Rich)
9. Re: In car power solution for GPS 18 (Ian ZL1VFO)
10. APRS in Ontario/Quebec (John Ronan)
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Message: 1
Date: Sat, 12 Aug 2006 09:52:09 -0700 (PDT)
From: Curt Mills <archer_at_eskimo.com>
Subject: Re: [aprssig] new software
On Sat, 12 Aug 2006, Anders Green wrote:
>At 10:35 AM 8/12/2006, wa7nwp wrote:
>>We also lost the incredible PocketAPRS..
>
>Was it good? I've never used it. There are currently no
>Palm OS APRS apps, right?
Wrong. No mapping ones though. This one is open-source and non-mapping.
Think of it as a HamHUD for the Palm:
--
Curt, WE7U. archer at eskimo dot com
http://www.eskimo.com/~archer
Lotto: A tax on people who are bad at math. - unknown
Windows: Microsoft's tax on computer illiterates. - WE7U.
The world DOES revolve around me: I picked the coordinate system!"
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Message: 2
Date: Sat, 12 Aug 2006 11:52:53 -0700
From: Dale Blanchard <wa7ixk_at_earthlink.net>
Subject: Re: [aprssig] In car power solution for GPS 18
Andrew Rich wrote:
>Gudday
>
>When I jump in my car, my GARMIN GPS18 (5volt version) takes a while to
>lace up on the sats. (because it has been off)
>
>I am wondering if I can throw a gell cell battery in there and charge it
>while the car is running. (and GPS going when the car is off)
>
>Now I need to know
>
>1) Should there be a diode in line ?
>2) Should there be a resistor to limit current to battery on charge ?
>3) Any low voltage cutout ideas ?
>
>Cheers
Why don't you just leave the GPS powered all the time.
I leave mine on all the time.
Even on a trip with my motorcycle with a smaller battery.
It will take a long, long time to run the battery down.
WA7IXK
dale
------------------------------
Message: 3
Date: Sun, 13 Aug 2006 07:08:48 +1000
From: "Andrew Rich" <vk4tec_at_tech-software.net>
Subject: RE: [aprssig] In car power solution for GPS 18
Ah,
the point from which this all runs is off an accecory line.
It is fused on a plug i can pull out in case of problems.
Valid point tho.
Andrew Rich
Amateur radio callsign VK4TEC
email: vk4tec_at_tech-software.net <mailto:vk4tec_at_tech-software.net>
web: http://www.tech-software.net
Brisbane AUSTRALIA
------------------------------
Message: 4
Date: Sat, 12 Aug 2006 14:25:50 -0700
From: "John Gleichweit" <smokeybehr_at_sbcglobal.net>
Subject: RE: [aprssig] In car power solution for GPS 18
I agree. Most GPS units take such a miniscule amount of power that it would
take several days of operation to run the battery down. If you do want to
run an auxiliary battery to run just the GPS, and possibly the TNC and XCVR,
then you'd need a charge regulator like what West Mountain has.
http://www.westmountainradio.com/SuperPWRgate.htm has all the charging
circuitry to keep from overcharging the battery.
--
John "Smokey Behr" Gleichweit FF1/EMT, CCNA, MCSE
IPN-CAL023 N6FOG UP Fresno Sub MP183.5 ECV1852
List Owner x6, Moderator x4 CA-OES 51-507
http://smokeybehr.blogspot.com
http://www.myspace.com/smokeybehr
------------------------------
Message: 5
Date: Sat, 12 Aug 2006 17:55:27 -0500
From: Gregg Wonderly <gregg_at_wonderly.org>
Subject: Re: [aprssig] In car power solution for GPS 18
John Gleichweit wrote:
>I agree. Most GPS units take such a miniscule amount of power that it would
>take several days of operation to run the battery down. If you do want to
>run an auxiliary battery to run just the GPS, and possibly the TNC and XCVR,
>then you'd need a charge regulator like what West Mountain has.
>http://www.westmountainradio.com/SuperPWRgate.htm has all the charging
>circuitry to keep from overcharging the battery.
My GPS uses 90mA. A 9v battery is 120mAH. Maybe newer ones do better...
Gregg Wonderly
------------------------------
Message: 6
Date: Sat, 12 Aug 2006 19:16:20 -0400
From: <dave_at_aprsfl.net>
Subject: RE: [aprssig] In car power solution for GPS 18
>I agree. Most GPS units take such a miniscule amount of power that it
>would take several days of operation to run the battery down. If you
Some GPS's aren't bad, sore are horrible.
The Evermore engines (Deluo units) have commands you can issue to the GPS to
conserve power even more using a windows app (can't think of the name off
the top of my head).
My "WeeTrak" project (http://www.aprsfl.net/weetrak) will run on it's 2ah
battery with a Evermore GPS engine and a VX2 at 3 watts beaconing for well
over 12 hours per charge before the battery drops below 11.5 volts. Before
I turned on the power saving options in the GPS, that was only about 7
hours. Considerable mA savings for turning off features in the GPS I didn't
need.
Another example though is my older Garmin GPS16 I have on my car... It would
drain the battery dead in about 36-48 hours if the car wasn't driven hooked
up all the time. Had to change that after needing jumped after a 2 day
flight at the airport garage. It's now powered by a power switching
transistor tied to the output of the 8 volt regulator inside my D700.
D700 is on, GPS is on. D700 is off, GPS goes off. No more dead battery.
I also know of a couple guys using shockey diodes with 7ah gel cells in
their cars to run their trackers. Car running, alternator charges gel cell.
Car off, tracker runs on the 7ah battery.
Just my thoughts :)
Seeya,
Dave
KG4YZY
www.aprsfl.net
------------------------------
Message: 7
Date: Sat, 12 Aug 2006 19:28:14 -0400
From: "KENT HUFFORD" <khufford_at_comcast.net>
Subject: RE: [aprssig] In car power solution for GPS 18
I have a GPS18 (PC version) When I turn the car on, it finds the sats and
comes up in about 15 sec. The GPS is on the ACCESSORY line, so it has not
had any power to it.
Go to the GARMIN web site and look at the technical specs on the 18. It has
almanac backup for up to 6 MONTHS built in.
Something is not right with yours, unless the car has been moved a 1000
miles between times the GPS was last on.
There are a bunch of ROM flash upgrades on the GARMIN site for the 18 also.
Kent
KQ4KK
------------------------------
Message: 8
Date: Sun, 13 Aug 2006 10:28:52 +1000
From: "Andrew Rich" <vk4tec_at_tech-software.net>
Subject: RE: [aprssig] In car power solution for GPS 18
We had a bad day for weather here.
It seems to be doing ok now, I have moved it on the dash a bit.
Seems the winscreen wipers were shielding it.
Thanks for your help
Andrew Rich
Amateur radio callsign VK4TEC
email: vk4tec_at_tech-software.net
web: http://www.tech-software.net
Brisbane AUSTRALIA
------------------------------
Message: 9
Date: Sun, 13 Aug 2006 20:56:12 +1200
From: Ian ZL1VFO <zl1vfo_at_yahoo.co.uk>
Subject: [aprssig] Re: In car power solution for GPS 18
>From: "Andrew Rich" <vk4tec_at_tech-software.net>
>Subject: [aprssig] In car power solution for GPS 18
>Gudday
>When I jump in my car, my GARMIN GPS18 (5volt version) takes a while to lace
>up on the sats. (because it has been off)
>I am wondering if I can throw a gell cell battery in there and charge it
>while the car is running. (and GPS going when the car is off)
>Now I need to know
>1) Should there be a diode in line ?
>2) Should there be a resistor to limit current to battery on charge ?
>3) Any low voltage cutout ideas ?
>Cheers
>
>Andrew Rich
>Amateur radio callsign VK4TEC
>email: vk4tec_at_tech-software.net
>web: http://www.tech-software.net
>Brisbane AUSTRALIA
Andrew,
1 Yep, and low voltage drop diode from the ACC. circuit, or use a relay
arrangement that only turns on when the main battery is charging, and
disconnects when you stop the engine.
2 Probably enough resistance in the wiring & internal to the Gel-Cell,
unless you have a whopping great big Gel-Cell...
3 Check this out, should do the job...
73,
Ian ZL1VFO
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