A Microcontroller Contest Finalist and Runner Up Winner.
This instructable is out-of-date. For the most recent version of the tutorial, see the website . Cheers!
This sentry gun autonomously tracks, aims, and shoots at targets, using:
-An airsoft or paintball gun
-A webcam to find targets
-A computer to process the video feed and aim the gun
-Servo motors to physically aim the gun and squeeze the trigger
-A sturdy tripod base
-A microcontroller to interface between the computer and the servo motors
-Lots of camo paint
The end result is a paintball/airsoft spewing robot, that can turn the tides of any match.
Video if it in action here .
Want to build your own?
You're in luck! All the help and information you will need is here, and the software is free and open-source. Lots of people have already used this system in their own sentry guns, with successful results.
So go ahead, make your own, and soon your own backyard will be no-man's land, too!
P.S. take pictures during the project, and when you are finished, send me a picture, and a description of your project, and I will feature it on the Successful Projects page of my website. Thanks!
Step 1: Parts List
$25 Arduino (or equivalent)
$27 3 Servo motors (pan, tilt, trigger) $9 ea.
$10 Assorted screws, nuts and bolts
$9 Wood/metal for construction
$5 USB A to B cable
$2 Some 22 gauge solid wire
$2 Servo battery box
Also, you will need a laptop or computer to run the sentry gun program. $250 for a cheap netbook, if you don't have anything else...