Gy-521 MPU-6050 MPU6050 Module 3 Axis Analog Gyro Sensors+ 3 Axis Accelerometer Module

I am fairly new to Arduino projects, so this was a perfect breakout board to get my feet wet. The major down side to this product is that its difficult to find info on it (as said by other users). After finding some code, the unit seems to work pretty well... I used this board on a quadcopter to help with the inherent stability issues.Hopefully I'll save some people the time to dig up this information. Here is a link for those doing arduino projects:[...] --> See first comment on this posthere's the source code for the I2C library I used:[...] --> See first comment on this postThis library contains two helpful examples; one that allows the raw accelerometer and gyroscope values to be accessed, and the other calculates Euler angles, yaw pitch roll, world accelerations, and quaternions. If you using this with an arduino, make sure that the I2C library and a MPU6050 library are in the Arduino sketch folder, this will allow it to compile correctly.This was also difficult to find:The GY-521 breakout board is wired to the Arduino Mega as followed:Vcc - 3.3VGND - GNDSCL - SCL (pin 21)SDA - SDA (pin 20)ADO - GNDINT - D2The GY-521 breakout board is wired to the Arduino Uno as followed:Vcc - 3.3VGND - GNDSCL - D5SDA - D4ADO - GNDINT - D2

Chip worked very well with my Arduino. I've used analog accel/gyro sensors before (Razor 6dof), so this was my first encounter with digital. Getting it up and running took a little bit of digging, but there is plenty of information out there to guide you. The best tips I can offer you is to first find code to calibrate this thing. They HAVE to be calibrated to work properly. Jeff Rowberg is a name that will come up, he's written a lot of code for it, but the actual calibration script I found was by Luis Ródenas. You'll need to include the library file, MPU6050.h, but that should be all together. This calibration script will produce 6 calibration offset values... 3 for each of axis for both chips (3*2=6). From that point on you'll need to write those offset values to the chip at the beginning of your code using the function similar to, "accelgyro.setXGyroOffset(30)".So bottom line is, this is an excellent board, it seems very accurate (within tenths of a degree), and works quite well once it's calibrated. Best of luck!

Ships fast and no issues!

Good, inexpensive IMU. Shipped promptly.There is no documentation with this device. You can find the datasheets online pretty easily, and the pins are marked as in the pictures. It would be nice for them to include some references to links to get started.. but if I can get it to work, anyone should be able to :-)It came with two headers to solder on - one 90 degree and one straight (just use one).The best library (maybe only) to actually use the DMU onboard is here: [...]With that library, I was able to make use of roll and pitch to display on an LCD and light up some LEDs. I haven't used the other MPU-6050 features yet (I think there is temp or baro on this too?)... It does get noisy at high sampling (100hz) rates, but dropping it to 20-25hz completely solved that. I believe some have applied their own noise-reduction to it, but I find sampling at 25hz is plenty enough for my purposes.

It's amazing how accurate this thing is for the money. After writing the code necessary to read in the gyro and accelerometer values the angles it measured were extremly accurate. It accurate enough to use for a quadcopter. I used a complimentary filter to find the angle values. The complimentary filter is simple and is as follows. angle = Filter_gain*angle_gyro+(1-Filter_gain)*angle_accel. I used a filter gain of .98 becuase the acceleromoter values can be very noisey.Tips:-Write some code to find the zeros for the accelorometer gyro in the beginning of the code before the main loop. Then use the calibrated values in your main loop.-Buy a soldering iron to attach this to the pin headers-figure out the angle measurment from the accelerometer and gyro by finding the sensitity for the setting you have.-For basic angle calc like I did on the arduino uno you only need to attach vcc to 5 or 3 volts, GND to ground, SCL to A5 pin, SDA to A4 pinAnother note Important note that drove me crazy:When I read in the gyros over i2c I found that the gyro y addresses were actually the -gyro x value and the gyro x addresses were the gyro y value. Not sure if that's specific to the one I received or if all are like this. (maybe the MPU chip itself was mounted wrong). Once I figured this out it was an easy fix so this still gets 5 stars.