Another option is to look at building it with Arduino and one of the GPS modules that go with it.
More on HTTP://www.arduino.cc Goodluck, Miten miten sampat | HTTP://about.me/mitensampat On Feb 1, 2011 9:44 AM, "Brian Russo" <[email protected]> wrote: > In the volumes you'd be purchasing you can get OEM GPS devices with a > usb or RS232 interface for around $30-35. > > Battery life is going to be simply dependent on the size of the battery > I wouldn't bother with buttons, just have it start feeding when the > power source is connected. Or implement a switch. There's no reason to > have it on when it's not doing anything. > > Accuracy is a function of many things, but CEP <30m is quite > achievable with even the cheapest OEM device under most circumstances. > > I doubt you're going to be able to build one with a transmitter for > <$50 in small volumes though. It's not really sensible engaging in R&D > for something like this unless you have specific requirements or are > going to build large volumes. Too much hassle unless you're going to > build hundreds or have unusual requirements (size, form factor, etc). > > You can get little zoombak trackers or garmin gps dog collars for > around $80-100. There are many systems like this (just google gps > tracking beacon or something), most involve a subscription around > $10-15/month. That's probably your best bet. > > Here's an example - http://www.zoombak.com/products/universal/ > > - bri > > On Tue, Feb 1, 2011 at 7:24 AM, Paul Faunik <[email protected]> wrote: >> >> I'm looking to build a location transmitter that would have the following >> constraints >> >> - low cost (sub $50) for the hw >> - long battery life. based on the device broadcasting location every 5 min >> and doing nothing else. days between charges? >> - two simple buttons : start broadcasting : stop broadcasting >> - the geo coordinates are relatively accurate most of the time - 30 meters >> (used almost exclusively outdoors in San Francisco) >> >> One thought is it could some super cheap older model cell phone, some simple >> native app to send geo coords to web service or send sms (if this >> circumvents a data plan), super cheap pay as you go phone plan, put it all >> in a box and just expose two buttons and the charging plug. >> >> Other alternatives? >> >> Anyone ever built or heard of such a project? >> >> thanks, >> >> Paul >> >> >> _______________________________________________ >> Geowanking mailing list >> [email protected] >> http://geowanking.org/mailman/listinfo/geowanking_geowanking.org >> >> > > > > -- > Brian Russo / (808) 271 4166 > > _______________________________________________ > Geowanking mailing list > [email protected] > http://geowanking.org/mailman/listinfo/geowanking_geowanking.org
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