Acknowledgements

A lot of thanks to Professor Joseph Skovira who helped us a lot on hardware constructions!
               Also to 2017SP ECE5725 TAs: Jacob George, Brendon Jackson, and Steven Yue.

References

http://www.micropik.com/PDF/SG90Servo.pdf

https://www.parallax.com/sites/default/files/downloads/900-00008-Continuous-Rotation-Servo-Documentation-v2.2.pdf

http://raspi.tv/download/RPi.GPIO-Cheat-Sheet.pdf

https://en.wikipedia.org/wiki/Raspberry_Pi

http://www.pygame.org/docs/

http://jeremyblythe.blogspot.com/2014/09/raspberry-pi-pygame-ui-basics.html

https://sourceforge.net/p/raspberry-gpio-python/wiki/PWM/

https://learn.adafruit.com/adafruit-pitft-28-inch-resistive-touchscreen-display-raspberry-pi/software-installation

https://learn.adafruit.com/adafruit-pitft-28-inch-resistive-touchscreen-display-raspberry-pi/touchscreen-install-and-calibrate

http://raspi.tv/2013/how-to-use-interrupts-with-python-on-the-raspberry-pi-and-rpi-gpio