Moderator Comment by Jack Crossfire on November 16, 2009 at 4:57pm

With the $50 RTK GPS modules coming online, it doesn't take much of a gyro to maintain heading anymore. Time to pick up some $5 lidar modules.

Comment by Rana on November 16, 2009 at 7:43pm

@Billu Bhaiya
Is there any plus point of analog output of a gyro for example take the case of this 3-Axis alalog output Gyro from ST Microelectronics ( LYPR540AH, High-Performance 3-Axis MEMS Gyroscope from STMicroelectronics Packs 360 Degrees of Freedom) ?

Regards

Rana

Comment by Angus Peart on November 16, 2009 at 7:49pm

Yes a huge plus point, you get much more control over what you are sensing. You can pick the resolution and it can be much faster than I2C or SPI to each sensor. With a digital sensor you are locked into these things.

Comment by Jianguo Zhao on November 16, 2009 at 8:33pm

good sensors, maybe they can try to make the package a little smaller.

Comment by Rana on November 16, 2009 at 8:44pm

Angus, thats really great !

Comment by Morli_ on November 17, 2009 at 3:29am

did I read the price right? " Unit pricing is $3.6 for volumes " ? so retail price in range if 10 -15 $ ? If I remember reading the difference between the Red and green board , will this module help to bring back the quality ( saturation resilience ) ?

Developer Comment by Randy on November 17, 2009 at 5:04pm

I'm pretty sure this really is the first single chip 3-axis gyroscope. What we saw (perhaps a month or two ago) was the introduction of 2-axis gyros that can be mounted FLAT side-by-side on a PCB so you get the same effect but with two chips. Up until then you always had to mount one of the gyros at 90 deg sticking out of the board.

Man, you can barely get the latest chip onto a breakout board before something better comes along!

With all the talk of vibration testing recently, I'm looking forward to the results on this one.

Comment by Angus Peart on November 17, 2009 at 5:45pm

Randy, check out the ITG-3200 I mentioned in the post.

Comment by Rana on November 17, 2009 at 6:06pm

After seeing the datasheets od ITG3200 & LYPR540AH, it is clear that both the devices are 3 axis gyroscopes.
ITG3200 is a 3-axis digital gyroscope where as LYPR540AH is 3-axis analog output gyroscope.

Angus, I have a Chinease 3-D Mechanical Gyro mounted in the X-UFO, similar to Quadrocopter.
It has 3 Hall sensors mounted in three orientations such that whereever the motor with rotating disc tilts, the change in magnetic flux is communicated by the Hall sensors.

I have seen almost zero vibration issue in this type of gyro, what u guys think about it ?

Comment by Rich Weaver on November 17, 2009 at 7:32pm

For accelerometers I have been looking at ST's AIS326 3 axis digital (+/- 2g) and so far like it better than the 7260 analog. Mainly because it comes closely calibrated from the factory and has 12 bits of digital accuracy which can easily get lost in micro a/d's. I can post plots if any one is interested.

Comment

• ‹ Previous
• 1
• 2
• Next ›
• Page