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sci.geo.satellite-nav (Global Satellite Navigation) (sci.geo.satellite-nav) Discussion of global navigation satellite systems (GNSS). Topics include the technical aspects of GNSS operation, user experiences in the use of GNSS, information regarding GNSS products and discussion of GNSS policy (such as GPS selective availability).

Connecting Handspring Visor to Garmin Etrex (basic yellow) GPS

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Old June 25th 03, 08:31 PM posted to alt.satellite.gps,sci.geo.satellite-nav
Carsten Kurz
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Posts: 1,498
Default Connecting Handspring Visor to Garmin Etrex (basic yellow) GPS

Carsten, many thanks for all your help but I'm still not sure how I
would convert the cable using a small 6-9 volts battery. Could you
elaborate please?

Have a look at Dales site. Basically the idea is to feed something between 5-9
volts to the RTS and CTS lines of the sync cable. This will power the
electronics. The easiest way to do this is to make a short converter cable
between Garmin-PC and VISOR sync cable, as you need a Tx/Rx crossing (null
modem) anyway. In addition to the crossing, you feed in the battery lines to RTS
and CTS to the visor side. You should also use a small resistor, something in
the 200-400 Ohm range in series with the battery.

- Carsten

Audio Visual Systems fon: +49 (0)2238 967926
Carsten Kurz fax: +49 (0)2238 967925
Fasanenweg 38a email:
50259 Pulheim / Germany WGS84:N5058'44.7" E0647'03.5"


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