Difference between revisions of "Bluetooth Headtracker"
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==other intertial Measmurement Units== | ==other intertial Measmurement Units== | ||
Revision as of 14:00, 14 January 2015
Contents
Hardware
Built with simple, ready to order parts from common suppliers. Purchase 1 each of the following:
- Bluefruit EZ-Link - bluetooth modem w/ baud rate detection - http://www.adafruit.com/product/1588
- Arduino Pro Mini 3.3V - https://www.sparkfun.com/products/11114
- Power switch - https://www.sparkfun.com/products/102
- GY-86 - 10 DOF flight control module with MPU6050 + HMC5883L + MS5611 - http://www.amazon.com/Arrela-Control-Ms5611-Hmc5883l-Mpu6050/dp/B00KKJYMO6/
- LiPo Battery - https://www.sparkfun.com/products/731
- LiPo Charger - https://www.sparkfun.com/products/10217 (note you need to cut off the JST connector to fit it in the enclosure)
- Small quantity of stranded ribbon cable.
One of the following, needed to program the arduino. (One use only! Borrow from a friend?)
- FTDI Basic 3.3V - https://www.sparkfun.com/products/9873
- FTDI Cable 3.3V - http://www.adafruit.com/product/70
You can also choose to leave the LiPo charger out of the enclosure for small space savings.
Software
This project uses the FreeIMU library to read the motion sensors and calculate sensor-fused orientation.
Arduino
We are using the straight FreeIMU_quaternion example from FreeIMU v0.4. This reads the attached sensors, calculates the AHRS quaternion, and transmits via serial print. I've attached a copy of the FreeIMU_quaternion code here with the baud rate set to 38400, the max rate for the Arduino Pro Mini.
You should only need to upload this to your arduino once.
Enclosure
Solidworks Files - File:btht_solidworks.zip
STL Files - File:btht_enclosure_stl.zip
Reference
other intertial Measmurement Units
Head-tracking with the MPU6050
- using Wire interface - http://www.varesano.net/blog/fabio/initial-tests-freeimu-v04-and-mpu6050
- using i2cdevlib - https://github.com/jrowberg/i2cdevlib/tree/master/Arduino/MPU6050/Examples/MPU6050_DMP6
- http://www.geeetech.com/wiki/index.php/MPU-6050_Triple_Axis_Accelerometer_%26_Gyro_Breakout
- IMU - https://dev.qu.tu-berlin.de/projects/sf-razor-9dof-ahrs/wiki/Tutorial
- https://www.sparkfun.com/products/11028 or even cheaper from Amazon
Example with Arduino Nano
GY-80=
GY-86
