Can somebody advise on this IMU unit is it better/worse than
something similar assembled from separate components?
For instance 3 chips from InvenSense
6-Axis Motion Processing Solution
IDG650 dual-axis family of roll and pitch gyros, its new single-axis ISZ650 yaw gyro sensor family, and the newly released IME-3000 3-axis accelerometer with three analog inputs.
Compass Module with Tilt Compensation - HMC6343
Do you expect to get it and InvenSense chips in the near future?
Kind regards,
Sergey
the IME3000 isnt out yet, but is due out soon. (not available on their website yet…)
the IDG650 is nice 2000, 440 but thats pretty fast rates…
why not go with a IDG 500?
sparkfun sells those breakout boards…
sparkfun already carries several of the things you listed. go check them out.
also be sure to look at ST’s new gyro lineup.
very cheap.
And what do you think about this one? Does sparkfun thinks to make something similar?
It is difficult to see from the picture what components do they use but it seem that they use LYSI300 + IDG500 too.
BOM of their board is hardly higher than 70$
The end price tag is a bit high, but the performance of the demo is superb
[VN-100 - 3-axis accelerometer, 3-axis gyro, 3-axis magnetometer All in one solution](http://vectornav.com/products/74-vn-100)
it looks nice and small but i think better to have remotely moutned mags (depends on your UAV platform i guess??..)
i cant talk for sparkfun, but im sure they have some great things in the works.
we are building a complete with GPS solution too, dev system… not a module.
Hi corvette123
I checked you site and I think I will be your customer … you have nice design too. When do you plan to finish it? What is your estimated price for it?
You have a point about external magnetometers
this device is confused near LCD screen 
http://www.youtube.com/watch?v=w-qEIkz90b4
I made some research during last several days and I think the best
IMU + MCU + extras design is this one.
http://www.skybotix.com/support/wiki/in … -_hardware
They have very cool separation
DSPs are doing navigation
and external more powerful CPU is used for payload application
So in the case of user application failure it is still flying
Kind regards
Sergey
we are hoping to get prototype 1 done in another month.
yes with mags you have to have a good blanking circuit and possibly offset options too… thats the right way to do it…
we dont have a price point as of yet…but it is modular.
3 modules right now
main NAV IMU board (with graphical OSD)
pressure board, airspeed, altitude, humidity, temp
MAG board
yes separation!! thats how we like it too.
we are using the 210 DMIPS MCU for kalman +nav + GPS and sensors (as much DMA as possible!!!)
–this will also send out OSD commands and movement commands to other units
the OSD MCU is 80 MIPS which is way more than needed, but can do NTSC,PAL doublebuffering and possibly HD but dont know about the HD yet… the circuit does support HD though…
so thats a total of 290 DMIPS in our design right now on the main board.
the 2 submodules will have their own small MCU’s, 16 bit for pressure and 16 bit for mags. theyll send it via I2C, SPI, RS232 or UART after doing their calculations etc… and can receive input data for adjusted calculations (like normalizing pressure at sea level to current day pressure reading based on the initial GPS altitude fix… happens once at startup)…
now for motor, servo control can use I2C, SPI, UART, RS232 to communicate with other board to do that… leave that upto user
with full source code available, it should be a very nice platform to develop on.
hoping for a quadrocopter, and a ground vehicle for proof of concept.
:lol: :lol: :lol: