What is the angular drift and walk of the Sensor Stick?

Now I'm wondering if anyone has tried to use more than one of these boards with a single Arduino? I have heard that there is a way to daisy chain them on the I2C bus, but there has to be a way to deal with the fact that the individual chips have the same addresses.

Noise on old version SEN-10321. In case any of you have the same noise problem, Ill try to save you some time. I have encountered about 30 counts of noise on the accelerometer. Spent a lot of time trying to "fix" my i2c I/F software which is fine. Turns out there is a nasty ripple on the 3.3v at the i2c clock freq (400khz in my case). Added a tantalum cap at the regulator (parallel the existing), and it knocked the noise way down to just 2 or 3 LSB.
Now to see why the magnetometer is wandering about.

Works perfectly in my Aeroquad Quadcopter!

Here's a simple logger using this, an Arduino, and an OpenLog.

We really love this device. We are using it on our robot for the DARPA Robotics Challenge. I posted code at the Arduno Playground. http://playground.arduino.cc//Main/SEN-10724

Hey guys and girls, I just updated the firmware at http://dev.qu.tu-berlin.de/projects/sf-razor-9dof-ahrs to be compatible with this board...

I thought this could be useful to some of you!

Cheers!

Check out this awesome wireless head mounted display with this IMU integrated into the HMD's body. This project incorporates two of these IMUs for simultaneous head and chest attitude measurement via bluetooth!
Link to Project Post

Will this chip run off a 3.3V supply?

According to this page it should. https://www.sparkfun.com/pages/accel_gyro_guide

But surely the onboard regulators will mean a higher supply voltage is needed. Any help would be much appreciated

In SparkFun's quickstart guide, it says you have to hook up the CS and SDO connections, but they don't exist on this board... How would I interact with the board?

Hello, we are trying to connect Sensor Stick to a raspberry pi, but after adapting code we are getting strange board behaviour and getting values like this yaw=-045.670 pitch=-084.399 roll=0124.634 yaw=0000.894 pitch=0041.903 roll=-055.366 yaw=0047.488 pitch= -nan roll=0124.634 what can it be?

I'm using the board for a small Formula car project, butI'm having an hard time dealing with it. I've to say that my setup is far from orthodox. I'm using long (around 1.5m SCL and SDA lines), with power coming from a 5V regulator on the main powerline of the car. At the testbench everything runs fine, however when the combustion engine of the car is powered up, the board freezes. I've managed to "unfreeze" the board by reinitializing the I2C protocol via software, however the gyro seems to stay locked at null output on all the 3 x y z registers and even power cycling doesn't help unless the engine is powered off. The board itself is far from the engine and vibrations are dampened trough some rubber strips. I personally suspect it's an issue related to power source noise/spikes, thus I was wondering if anybody has experienced such an unstable behaviour from the ITG3200 gyro in noisy environments and which countermeasures should be implemented. Thanks

Using the stick with the stellaris launchpad. The only issues that I saw from adapting the AHRS/Head-tracker tutorial and code is that the values don't rollover when receiving from the stick, and the gyro gives crazy values throwing the whole thing out of whack. When sending the raw values to a python script and applying a kalman filter the crazy values went away, but there is still some jitter (just using the head-tracker if I got a bad value I skipped the euler angles and reset the sensor fusion, but if anyone took the time there is a better fix). This is a great product for the price!

Crazy, I bought this for 99.95 and now it is only 49.95. :(

I think that this chip is overpriced. I bought a Chinese IMU with all of the same components for 14 dollars.

its called the GY-85. Warning there is no support!

Wow. What a PITA. But - finally Netduino and WPF (vua MQTT); https://www.youtube.com/watch?v=gfjlle_gpPo

In case anyone else is wondering the ITG 3200 temperature format is not at all obvious. -13200 represents 35 Celsius, then every 280 counts is one degree Celsius. In other words...

temperature = (TEMP_OUT_H << 8) | TEMP_OUT_L
temperature = 35 + (temperature + 13200)/280

Sorry if these are old questions but I could not find them in the discussion:

On the schematic, what is U4? and what are the pin numbers? Are there any specs on the power supplied via Vcc? I see that internal power is 3.3v so presumably the input must be higher due to regulator drop out (even on an LDO)

Hi everybody

Does anybody has any experience or code available for working with this sensor and a STM32F4 discovery board? I need to read out all the axis of all of the sensors for an ADCS for a CubeSat but I am not finding any solution online and the examples provided by ST are very limited..

Greetings Ben

The y-axis arrow printed on the board is correct?

Is it possible to slow down the clock speed so that the I2C signal can be sent a longer distance? I know that slowing down the clock will enhance the range that an I2C signal can travel, along with using twisted pair, but how will slowing down the clock speed affect the board/signal?

Trying to use this board with a 3.3v RFduino, but no luck getting it to work. Does it require a higher voltage than 3.3v? If so, it would be really good to mention this somewhere in the product description…

I bought this IMU and I am trying to read its data. Right now I am having problems with the accelerometer ADXL345. I am reading the X axis' acceleration data correctly. It has a little noise but nothing to worry about. The thing is that the Y axis' acceleration has a bigger noise. I have a lot of points that are ok but frequently I receive bad readings or points that are to far from the real value. Regarding the Z axis' acceleration, the data is totally wrong. It has almost no relation with the real value of the acceleration. I am about to think that the chip is broken. What's do you suggest to me to try or check?. I am processing the data of the three axes in the same way (copied a pasted code) so if the code works for X axis it should work for the Y and Z axes. Have you had a similar problem?.

Hey guys, I'm just wondering why this 9DOF is $15 cheaper than the IMU Digital Combo board 6DOF? I could have sworn it was more money before... https://www.sparkfun.com/products/10121

This has extra components and does more.

What is the format of the data output of this sensor stick?

Does anyone have a working code for connecting this to an OpenLog?? Thanks!!!

will this work with a 3.3 voltage supply & atmega328 running on 3.3 volts. I saw something about it having voltage regulator onboard that needed 3.5 volts…

i have a very basic doubt regarding the device placement of gyro, accelerometer, magnetometer. Are they not required to be place on the exact center of PCB to get best performance. Do we compromise performance of devices by placing it offset to center. And is there particular measurement to place gyro and accelerometer and magnetometer apart?

All the specs state these sensors will support fast mode (400 kHz). Wonder if anyone has tried it with any problems

Hello everyone

I bought the " 9 Degrees of Freedom - Sensor Stick SEN-10724 " and " Arduino Uno " , I connected them together and i used the " AHRS/Head-Tracker Tutorial " above.

When using the coding for " Arduino " it works perfectly fine and i do get reading.

When running the processing code it takes a lot to run ( Approximately 10 mins ) i have no idea why ??????

Any help is highly anticipated ..... Please note that i am a beginner thanks.

Hi , I have got the 9 DOF Sensor Stick up and running on the I2C Interface of my STM32F4 discovery - I can read value from all three of the sensors - now I want to advance to use the more sophisticated functions like the freefall detection of the ADXL345 - therefore I configured an EXTI Interrupt on the GPIO Pins the sensor stick uses to connect to I2C ( PB6 or PB7 on the discovery) - But every time I run the this code it renders the I2C bus busy - and the execution stalls - my current analysis of the problem is that there is a conflict between the bus activity (or the GPIO setup) and the Interrupt setup - My question is are the interrupt lines of the ADXL345 (and the other sensors) connected to the I2C Bus wires (ie. INT1 to SCA INT2 to SCL) - I could not descern this from the schematics -and if so : is it the right approach trying to configure the interrupts on the same pins - or how else is it possible to access the Interrupt lines of the sensors ?

Thank you in advance best regards Stefan

Does any one have working Arduino software for this board???

Hi, I don't get the gyro and compass to work. Does someone have any advise? I did manage to get the individual brakeout boards of the gyro and compass to work, how does this board differ? Thanks!

Hello World.

Does anybody know on how do i reduce the noise of the measurement? In hardware perspective.

I was wondering are there any examples using 9DoF and an msp430?

I bought a 10DOF on eBay for $25. Works so well I bought another one. I can't imagine paying $100 for something like this.

What is the drain for this unit?

More specifically, can I use this inductive charging system to power the IMU? I only need to power the IMU for 30 mins.

http://www.mouser.com/new/cymbet/cymbetcbceval11/

If you know of a better inductive charging kit, let me know!

sensor was working before. now I don't get any readings using the program from the tutorial. I'm using an Arduino Mega. What could it be?

I bought a SEN-10724 about a year ago, are the chip all the same on this one?

thanks

NOOO!!! back ordered!! ETA??

quite expensive. i can get one of these with the mpu6050, a 3-axis magnetometer, and a bmp085 pressure sensor for 35 bucks.

The datasheet for the HMC5883L magnetometer has specific instructions and diagrams regarding PCB copper layout. Amongst others - no conducting copper under/near the sensor in any of the PCB layers - yet both the photos and Eagle files show both active traces and spare copper under the sensor. I was considering using this board, but it seems the PCB designers have not consulted the datasheet correctly. The same is true where this sensor is also used in the 9DOF Razor IMU. Could the PCBs be changed in the future?

I see that at least one other user wants to do what I want to do: use two of these on the same I2C bus. Technically, I want to use 4 of them on 2 I2C buses.

Both the Accel and the Gyro are already using the 'optional' address by grounding a pin. I have busted a couple of boards :-( by trying to enable the "normal" address with the old cut-and-jumper tricks. Too small.

It would be AWESOME if the next revision had a solder-pad option to select a few things: 1) ADXL: Alt Address pin held High or held Low 2) ITG: Alt Address Pin held High or held Low 3) HMC: Connect or Disconnect Power (because it does Not have an alternate address)

It may even be possible to put all this on the back of the board and not take up space?

I'd make the same request for the other (no Compass) version: IMU Digital Combo Board - 6 Degrees of Freedom ITG3200/ADXL345 (SEN-10121).

I would buy several more if either item had this option!

I am uncertain how the sensor alignment arrows are meant to be read.

When I have the sensor stick inverted do the sensor alignment arrows reference the inverted alignment, or normal alignment? While inverted the magnetometer's y-axis arrow points right, does this mean that at normal orientation the magnetometer's y-axis is pointing left?

Thank you

I got this running on the FPGA of a National Instruments sbRIO 9606 embedded board.

https://decibel.ni.com/content/docs/DOC-23854

Has anyone tried getting the Razor AHRS firmware/software working over XBee wireless? The tutorial provides provisions for use with a Bluetooth Mate, but not with an XBee...

EDIT: Got it working... actually easier than expected. Many thanks to Peter Bartz from Razor AHRS. :)

Where is the difference between this and the Razor IMU (http://www.sparkfun.com/products/10736) Is it possible to get a RS232 output? Or is it even possible to get it on CAN-Bus? Thanks for the help!

This is a great little bit of kit, but I've been scratching my head over an odd and intermittent problem with the gyro. Sometimes it works just fine, giving me obviously correct data; other times it just gives me crap, with the roll rates close to zero no matter how the board is moving. One hour it's working, then without changing any hardware, it isn't.

The temperature sensor in the gyro works fine all the time, giving me good data, so I know the gyro is powered up and responding to I2C, but the roll info is sometimes junk. Could this be a bad gyro? Can these gyros just get stuck? Is there a way to force a reset and get it going?

Hello, I have 4 of these sensor boards and tryed to multiplex between these four with a 4052 analog multiplexer. The gyro and accelerometer give response, but not the magnetometer. It seems like the 4,7kohm pull up on the sensor boards in combination with the 4052 gives to high resistance so the magnetometer could not process the i2c signal. If I use the same code and same schematic by just replacing the multiplexed lines from the 4052 with some hardwired multiplexing on its socket everything works with the magnetometer,too.

Has somebody an idea, how I could solve the problem?

Odd.. the ITG-3200 has more noise than the breakout board does, even if the sensors are swapped or a new sensor is mounted. Any fixes to this? Might be the regulator?

Hi! I'm planning to use this with a 5v system, do I need to use some level conversion for this or is it just Plug'n'Play ? :)

As this board obviously cannot be configured, like the 9 Degrees of Freedom - Razor IMU - AHRS compatible, what is its bandwidth??

I can see in the datasheet that the bandwidth of the gyro is max 256 Hz, is it than running full speed?

Petar

Just so anybody looking to purchase this knows. It has voltage regulators built into the board so no external ones are necessary.

why is this board $20 more expansive than *ITG-3200+ADXL345 *HMC5883L

it should be less expansive, because of board density (n° of PCB/m^2)

When SEN-10724 will be available?

For anyone else still struggling with this board, I got the Razor_AHRS 1.3.3 code from here: https://dev.qu.tu-berlin.de/projects/sf-razor-9dof-ahrs/files to work by changing around the values in the SENSOR_SIGN array to {-1,-1,-1,1,1,1,1,-1,-1} in Razor_AHRS.ino and switched the buffer addresses for magnitom[0], magnitom[1] in Sensors.ino.

Oh, it would have been a beautiful board IF Sparkfun guys break out the interrupt lines for each of the sensors - it makes programming MCU soooo much nicer without wasting time to re-query each of the sensors to find out when it is ready.

Is there any example code available for this board yet? I seem to need a jump start.

The SDA and SCL traces run under the magnetometer...

After reading all the comments below, I'm not sure what to make of the issue with applying pressure to the chips. Is this an actual problem with the latest release of this module? or not?

Hi, I'm working on an educational program and would like to introduce my students to inertial guidance. Problem is I'm not a programmer or electronics engineer :-( and I have no idea how to access the different sensors in turn on this :-(
So any demo code (basic stamp if I can be picky, but Arduino will do too) on this stick would be greatly appreciated
Erik

Is the i2c interface atmel ready (voltage ...)?

Does this one have the same problem as SEN-10321? ie the mag sensor only works when pressure is applied?
I have had 2 of those DoA so far :(

Just wanted to confirm if the regulator on this breakout board is the MIC5205?

Thanks.

Is there any breakout board?

I discovered "Replacement Value $ 14.00 "　with a screen of checkout.
I have a SEN-10321, but want to change it.
Can I change it for SEN-10724?

Still no Baro Temp? Why is it so hard to add one to basically do everything?

cheaper magnetometer but the same price as the old version?

It looks like the link to the magnetometer datasheet is still pointing to the old version (HMC5843).

new version yay! might save up and grab one of these later this fall