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[aprssig] Auto Radio On/Off - WAS The best resolution of position from APRS

Wes Johnston aprs at kd4rdb.com
Wed Jan 4 03:26:20 UTC 2006


Be glad to.... Scott sold me a new prototype of an opentracker that can
switch power on and off.  I think tiny track can do the same... but
Scott's board already has the layout that includes a place to mount a
power mosfet.... IPS5451.  On Scott's board, it has large diameter holes
for 12gauge wires to hook to power pole connectors.  I just plug the
tracker into the PP connector in the trunk and daisy chain the 2m radio.

Again, tiny track can do the same thing, but you'll have to provide your
own PCB for the mosfet and power pole connectors.

Wes

A.J. Farmer (AJ3U) wrote:
> On 1/3/06, Wes Johnston <aprs at kd4rdb.com> wrote:
> 
>>The open tracker
>>runs all the time and the 50w 2m radio only comes on 2 seconds before
>>transmitting a position... neat!
> 
> 
> Hi Wes,
> 
> Could you briefly explain how you get the radio to come on 2 seconds
> before transmitting and then turning off afterwards?  Sorry if I
> missed it earlier in the discussion.
> 
> Thanks!
> 
> --
> A.J. Farmer, AJ3U
> http://www.aj3u.com
> 
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