Our flanged collars for sale: http://www.ebay.com/itm/332049674170?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649

USEFUL LINKS:

Get the code and the project instructions on our github page: https://github.com/HackerHouseYT/Tracking-Turret

Download the 3d printable files on our Hackaday.io project: https://hackaday.io/project/18665-motion-tracking-airsoft-turret

I2C setup guide: https://learn.adafruit.com/adafruits-raspberry-pi-lesson-4-gpio-setup/configuring-i2c

Adafruit stepper motor HAT: https://github.com/adafruit/Adafruit-Motor-HAT-Python-Library

OpenCV 3 on a Raspberry Pi 3: http://www.pyimagesearch.com/2016/04/18/install-guide-raspberry-pi-3-raspbian-jessie-opencv-3/