1. Adam Turner Network Security & Electronics Program, Dept. of Applied Engineering & Technology, Eastern Kentucky University

2. OUTLINE  Sometimes persons may enter rooms in my home and mess with my stuff without permission. My home does not have many doors downstairs where most of my cool stuff lives. A sentry turret that fires plastic 6mm airsoft pellets should hopefully keep people away from my stuff. A turret will be constructed and installed in one of my rooms without a door. The turret should not cause real physical harm to persons or animals, only keep them away from my stuff. 2

3. MOTIVATION  My closet has no doors  My two animals can eat or destroy anything  A sentry presence should keep them away 3

4. INTRODUCTION  Autonomous Sentry Project has been around for many years  Open source code is available for the tracking software.  Many people have been successful using this code. 4

5. PROBLEM STATEMENT 5

6. Assumptions  Builder has access to an arduino  Builder understands basic mechanical engineering  Builder understands basic electronic engineering  Builder can read and edit java  Builder wants a sentry 6

7. PROPOSED SOLUTION  Attempted a direct drive sentry  Parts were too heavy for servos to support them  Had to create support for servos  Had to design a system that could withstand lots of torque and inertia from moving parts 7

8. Initial Platform 8

9. Many parts were salvaged/free 9

10. I needed a sentry, to protect my sentry build 10

11. Block Design 11

12. Wiring Schematic 12

13. RESULTS  Main issues were with the software  Was intended for older operating systems  Had to download many C libraries not included with windows 7  Had to find Arduino libraries called in the code and put them in the correct folders for processing 13

14. Source: https://www.youtube.com/watch?v=bY8OI2IKUBI&feature=youtu.be Sentry Gun

15. CONCLUSIONS  Appears to work, however, will track any motion or perceived change  Software at mercy of the webcam  Vibrations in the camera make the software perceive motion 15

16. FUTURE WORK  Stop the vibration with even more rubber washers  Make a mount that attaches to picatinny rails and adjusts for center of gravity  Contact: Adam_turner38@mymail.eku.eduAdam_turner38@mymail.eku.edu 16

17. REFERENCES  Make Your Own - Project Sentry Gun. (n.d.). Retrieved April 13, 2015, from http://projectsentrygun.rudolphlabs.com/make-your-own  Real-Life Sentry Guns for Sale - Targeting System Software History. (n.d.). Retrieved February 15, 2015, from http://www.realsentrygun.com/softwareHistory.  SENTRY GUN - New Airsoft gun by Redwolf Airsoft [English]. (n.d.). Retrieved February 23, 2015, from https://www.youtube.com/watch?v=y_fFsGp1y_Q  Autonomous Paintball Sentry Gun. (n.d.). Retrieved February 23, 2015, from http://www.instructables.com/id/Autonomous-Paintball-Sentry-Gun/  Sentrifying a Nerf gun. (n.d.). Retrieved March 2, 2015, from http://hackaday.com/2013/07/03/sentrifying-a-nerf-gun/  SentryGun53/Project-Sentry-Gun. (n.d.). Retrieved March 2, 2015, from https://github.com/sentryGun53/Project-Sentry-Gun  Download Processing. Processing is available for Linux, Mac OS X, and Windows. Select your choice to download the software below. (n.d.). Retrieved April 13, 2015, from https://processing.org/download/?processing  Arduino - Learn the basics. (n.d.). Retrieved April 13, 2015, from http://arduino.cc/en/Tutorial/HomePage 17

18. ACKNOWLEDGEMENTS  Project Sentry at Rudolph Labs  Link to project video: https://youtu.be/bY8OI2IKUBI https://youtu.be/bY8OI2IKUBI 18