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<h1>NOTE: this has been superceded by https://github.com/roberttwomey/bluetooth-headtracker. Please go there for supercollider code, etc.</h1> https://farm9.staticflickr.com/8567/16281491925_66cc3868bf_z_d16281491925_66cc3868bf.jpg A bluetooth, rechargeable, 10DOF head-tracking device for use with the [http://www.ambisonictoolkit.net/ Ambisonic ToolKit (ATK)], motion capture, and [[Pan-Tilt]] camera systems. This is the second prototype. __TOC__
=Hardware=
*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 [[http://www.varesano.net/projects/hardware/FreeIMU FreeIMU]] code library to interface with read the various motion sensorsand 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. You should only have to upload I've attached a copy of the FreeIMU_quaternion code once. Be sure to change here with the baud rate set to 38400, the max rate for the Arduino Pro Mini, 38400 bps. You should only need to upload this to your arduino once. [[:File:FreeIMU_quaternion.zip]]
==Processing==
This is the demo app in Processing included with FreeIMU v0.4.
#With the headtraker powered on, pair your computer with the bluefruit device.
#Change the serial port screen to match your bluefruit device, for example ''/dev/tty.AdafruitEZ-Link3e2f-SPP'' on my system.
#Run the example. Press 'h' to store the home position.
[[:File:FreeIMU_cube.zip]]
==Python==
Simple python program to read from the IMU headtracker and record to file. Additionally opens second serial device and feeds values to pan-tilt camera in matching orientation.
[[:File:head_through.zip]]
==Supercollider==
coming soon... :)
=Enclosure=
https://farm8.staticflickr.com/7538/16255567716_410f1b46dc_z_d.jpg
==3d Printing==
Solidworks Files - [[:File:btht_solidworks.zip]]
STL Files - [[:File:btht_enclosure_stl.zip]]
==Assembly Instructions==
=Reference=
==other intertial Measmurement Measurement Units==
Head-tracking with the MPU6050
Example with Arduino Nano
*http://www.geekmomprojects.com/mpu-6050-dmp-data-from-i2cdevlib/
*https://github.com/vshymanskyy/GY80
*http://amzn.com/B00KDMJBFK
