[aprssig] Android HUD Development

Rud Merriam k5rud at arrl.net
Fri Jun 10 14:30:25 EDT 2011

Another option is to use the mike / earphone jack. PocketDigi does this 
with Windows Mobile. You can connect to a xcvr to do sound card digital 

I think timing would be a challenge with the magnetometer. My game 
Galactic Patrol: Zap GPS uses the compass and gravity sensors. You 
position the phone to shoot down GPS satellites. The sensors don't 
respond all that quickly on my G1 phone and the response is pretty 
sloppy and dependent on what else is running on the phone. They are 
useful for their purpose but transferring signals isn't one of those 

- 73 -
*Rud Merriam K5RUD
Emergency Coordinator
/Montgomery County ARES® <http://www.wa5eoc.org/> /
* /Mystic Lake Software <http://mysticlakesoftware.com/>

On 6/8/2011 1:16 PM, Scott Miller wrote:
> On 6/6/2011 3:17 PM, Rud Merriam wrote:
>> I am thinking of working on an Android based APRS HUD. Originally it
>> will be for phones but later be put on tablets. I know there are a
> I just got a Droid X2, so I've been thinking about what I could do 
> with it for APRS.  I'm going to work on adding Bluetooth support to 
> the Tracker2, but it looks like it's going to be relatively expensive 
> and possibly a little clunky with the pairing and such, not to mention 
> the power consumption.
> But a hack I saw online the other day gave me an idea - they were 
> feeding data into a Droid phone with a simple electromagnet coil, 
> using the phone's magnetometer to read it.  Seems like that might be a 
> cheap and easy way to build a cradle for an Android-based HUD to 
> receive data from a TNC.
> Scott
> N1VG
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