I am looking at a project which requires a simple GPS receiver (notwaas/egnos) and a low grade solid state gyro (not a "level") like theones you get in smartphones.The build volumes will be initially a batch of 100 and later perhapsthousands, but not more than that.What would be the currently recommended GPS module or chip, and asolid state gyro component?There is a lot of stuff on the market...One requirement is reasonably low power - milliamps rather than 10s ofmilliamps. I have no idea if that is possible.Ideally the two items can be obtained for under $20-30.Any pointers would be much appreciated.

I'd start by checking DigiKey and Mouser for the gyro chips, and maybe Circuit Cellar ads for GPS modules (as well as DigiKey).There's not a lot of GPS augmentation that you can do with a gyro and no accelerometer -- what are you trying to do?-- Tim WescottControl system and signal processing consulting

What is the cheapest way to get a GPS + solid state gyro?

Apr 29, 2012 24 Replies

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Jan Panteltje 14 years ago

On a sunny day (Mon, 30 Apr 2012 13:36:14 -0600) it happened hamilton wrote in :

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Thanks! I have downloaded the pdfs, maybe I buy one just for fun, could be an other PIC project, and combine with my fluxgate compass... Years of fun ahaead... Maybe needs a more powerful computah, one of those recent Linux based boards perhapds (display maps on LCD etc). ;-) I would not use FAT filesystem ....

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Rich Webb 14 years ago

Yes, it's definitely one of those "works in theory but..." applications. But in theory, it would work. ;-) In practice, it could be good enough to work thorough the "urban canyon" effect for brief GPS outages, although the addition of a simple fluxgate compass would help tremendously.

Rich Webb Norfolk, VA

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Jan Panteltje 14 years ago

On a sunny day (Mon, 30 Apr 2012 13:36:14 -0600) it happened hamilton wrote in :

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PS I ordered this one:

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because it has build in antenna and I do not have to design the GHz stuff. Connections are also much easier to make. It is a bit more expensive, but not if you include all that RF stuff.

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Jukka Marin 14 years ago

Those systems also use the speed/distance information from the wheel sensors, so the can be pretty accurate. A bit like a hi-tech device called odometer ;-)

-jm

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Tim Wescott 14 years ago

If you can be pretty sure that there's no skidding going on, an odometer and a steering-position sensor should be able to mostly or completely replace gyros, accelerometers, etc.

Of course, the more sensors, the merrier.

My liberal friends think I'm a conservative kook. My conservative friends think I'm a liberal kook. Why am I not happy that they have found common ground? Tim Wescott, Communications, Control, Circuits & Software http://www.wescottdesign.com

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