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ready-made GPS-units
- Garmin - vehicle and handheld units.
- GPS-35 vehicle
GPS unit, low voltage model available.
- eTrex handheld GPS unit, 4.4"H x 2.0"W x 1.2"D (11.2 x 5.1 x 3.0 cm) - has been reported to operate with [[http://www.nomad.ee/micros/etrex.shtml][2.5V 130mA (0.325W)] with a low price tag at wal-mart for $120. - Rick Jones
- MiniAutoGPS - works on Ipaq and Laptop
GPS-boards
A while ago Dr Altaica mentioned the small GPS receivers at
Tri-M systems. I remember the post saying that they were in
DIP packaging (ie single chip), but all I found were the
Royaltek GPS receivers. They aren't really single chip but
they are very small modules. I have never seen a single chip
GPS receiver. If there is one in DIP packaging, I'd love to
know about it, since it would drop right into my soldered
breadboard material and mate with a microcontroller very
easily. It appears that the Royaltek receivers could mate to
a microcontroller with ribbon cable, or to a host PC with
addition of RS232 level converter IC.
http://www.tri-m.com/products/royaltek.products.html
Some of the models are a lot bigger than others:
Rotaltek REB2000 30 x 30 x 8 mm 170 mA @ 3.3V = 0.561 W
Royaltek REB2100 40 x 32 x 7 mm 170 mA @ 3.3V = 0.561 W
Royaltek REB12R6 71 x 41 x 7 mm 180 mA @ 5.0V = 0.900 W
Royaltek REB12R7 71 x 41 x 7 mm 180 mA @ 5.0V = 0.900 W
Royaltek REB12R30 71 x 41 x 7 mm 180 mA @ 3.3V = 0.594 W
(also with atached antenna as OEM-package.) Prices are about 100-120$
They all seem to have NMEA 0183 output, which is acsii text, and they
are TTL serial, can be connected direct to microcontroller or to host
RS232 port with addition of a DS275 or MAX232 level converter. There
are no advanced binary features on these. I bet they are cheap for
that reason. The REB2000 looks good to me.
> how much does it cost
No idea on price. They're not in the EMJ catalog.
> what kind of data do I get (hopefully NMEA?) etc. etc.
NMEA 0183 and that's all.
Laipac TF30 40 x 40 x ?? mm 140 mA @ 3.3V Price $130
http://www.laipac.com/msg4.htm
I bought a GPS-MS1E for $155 online but its 84-pin PLCC
Its 30 x 30 mm
Motorola has a GPS chip but its 64-pin ball grid array
http://www.motorola.com/ies/GPS/products/prodmg2000.html
My Motorola GT Oncore is 83 x 51 x 16mm. 0.9 watts
http://www.motorola.com/ies/GPS/products/prodgt.html
Nice receiver but I'm liking that REB2000 30x30x8 footprint.
GT Oncore has much more advanced features using mot binary.
Trimble has some embedded modules:
Lassen LP 66 x 32 x 12 mm 61 mA @ 3.3V!!!
Lassen SKII 82 x 31 x 10 mm 120 mA @ 5.0V
These have NMEA plus binary protocol
http://www.trimble.com/oem/om_embed.htm
Sigem has some small modules too:
5610 80 x 40 x 9 mm 100 mA @ 5.0V
5607 71 x 56 x 10 mm
5608 89 x 33 x 8 mm
http://www.sigem.ca/contentpages/4_gps_engines.htm Here's a summary of all of the above OEM modules
U-Blox GPS-MS1E 30 x 30 x ? mm 140 mA @ 3.3V = 0.462 W
Motorola GT Oncore 83 x 51 x 16 mm. 180 mA @ 5.0V = 0.900 W
Trimble Lassen LP 66 x 32 x 12 mm 61 mA @ 3.3V = 0.201 W
Trimble Lassen SKII 82 x 31 x 10 mm 120 mA @ 5.0V = 0.600 W
Laipac TF30 40 x 40 x ? mm 140 mA @ 3.3V = 0.462 W
Sigem 5610 80 x 40 x 9 mm 100 mA @ 5.0V = 0.500 W
Sigem 5607 71 x 56 x 10 mm ?
Sigem 5608 89 x 33 x 8 mm ?
Given the small package (30x30mm) and simple interface (header)
on Royaltek REB2000, that will likely be my next receiver. It
has no binary protocol but is oh so small. Lassen LP looks nice
at 0.2 watts and 66x32 footprint. I have no idea how these power
figures compare to the consumer RS232 or USB devices. These
comparisons should be articles in a wearable magazine!!!
-- MarcusWolschon - 23 Feb 2002
-- MarcusWolschon - 27 Apr 2002
repaired formatting, added miniAutoGPS
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