Re: GPS receiver question
- From: rickman <gnuarm@xxxxxxxxx>
- Date: Mon, 21 Jul 2008 07:32:47 -0700 (PDT)
On Jul 21, 2:43 am, vorange <orange...@xxxxxxxxx> wrote:
I'm looking for an easy to use/integrate gps receiver.
I've come across tyco's products.
Is one of these babies all I would need or is there some 'antenna' or
other stuff required that's not shown in the picture?
I plan to hook it up to an MCU.
http://www.tycoelectronics.com/gps/modules.asp
If there's anything better you've come across, please let it be known.
Thank you.
I worked with GPS modules a couple of years ago. They are getting
very small and very low power. The cost seems to be about constant at
about $100 in qty 1 (depending on source) and below $25 in qty >
10,000, perhaps as low as $15 in very high quantities.
They mostly use similar interfaces. The on-module CPU talks to the
outside world via either a serial port (typically TTL levels) or some
use USB. You need to provide an antenna. Typical units are either a
"patch" about 2" square or a helical coil. A helical coil can be made
yourself by winding small gauge wire on a core. It might be easier
though to build your own patch which is just two layers of copper on a
PC board. If you search a bit on the web, you will find significant
info on building your own GPS antenna.
I have been thinking for awhile about building my own handheld GPS
receiver and I am leaning toward using a commercial Bluetooth GPS
receiver rather than an integrated module. I like the decoupling of
the two units although it is a bit more awkward having two batteries
to keep charged. The technology improves and will be taking a big
step in the next couple of years as the European sats become part of
the overall network. Also there are new frequencies and capabilities
being added which will give better accuracy. Using an integrated
module will make it much harder to upgrade to keep your GPS receiver
up to date.
Rick
.
- References:
- GPS receiver question
- From: vorange
- GPS receiver question
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