National Robotics Week Robot Contest: Age Group 13-18 

Whether you are fighting in an airsoft battle, or defending your desk at work, an airsoft turret is a must have.  In this Instructable I will explain how to make a relatively cheap and simple turret based off of an Arduino Mega.  Once you have the basic turret built, there are many cool things to add that can make the turret a lot more complex and fun to play with.

Here is an example video of what you can do with the turret:

Step 1: Materials and Tools

While it seems that there are a lot of parts required, this project can be done on a relatively cheap budget depending on where you buy the parts.  The following parts are what I used to make my turret, they do not have to be exactly the same.


Crossman R-71 Airsoft gun
Airsoft bullets

Arduino Mega
Arduino Mega Protoshield from Sparkfun
BlueSmirft-Bluetooth Modem
VEX 9.6V battery
(2) VEX Continuous Rotation motors
VEX Extension Cables
Assorted electronic parts *See airsoft gun electronics page

Assorted VEX metal
Assorted VEX screws and nuts
(2) VEX 84-tooth gears
VEX 12-tooth gear
VEX 36-tooth gear
VEX axles

FoamCore board
RoboRealm Software
(optional) Laser pointer
(optional) Wireless Camera

Hot glue gun
Soldering iron
X-Acto Knife
Wire cutters/strippers

<p>I should make one in my room, but somehow it hsould now me, this way my brother won't get into my room again!</p>
<p> I will take this to the paintball next time :) Just sit back in the cover and watch them scream!</p>
<p>Great Pal, congratulations for your effort.</p>
<p>Nice idea! When did the idea came up to you?</p>
<p>i like it but why do you have too take off the barrel? </p><p>(great aim!)</p>
<p>next project: face detection :D</p>
<p>can you make me one, i have no clue what these words mean</p>
Where do you explain how to connect the servos??? Also is it necessary to use VEX servos??? Great ible by the way. Thanks
It was beautiful. I hope good luck on the next project
I liked that scene in Aliens where they had the auto turrets killing them off. Also played this lesser know game called Fireteam and u could find auto turrets in there for protection. Looks pretty nice but work places I've worked don't allow weapons even toy ones these days :( Nice accuracy.
could you use a paintball gun for this turret with the same electronics? such as a spider pilot ACS, get back with me on this ASAP PLZ!!!
Mostly yes you will probably need better motors for moving the gun around
Check out this link: https://sites.google.com/site/projectsentrygun/home<br>A lot of cool stuff, helpful to.
I am currently working on a Paintball Sentry as well so I can tell you don't base it off this instructable as this is built for a much lighter weapon to be mounted. Yes the electronics are the same but as for the same turret very unlikely.
Great work! I'll trade you some autonomous code for some joystick code... https://sites.google.com/site/projectsentrygun/<br>
man that amazng work u did i really want to build one i have a question if all i do is use the joy stix will i have to have the pc to power it . what im meaning is if i took it to a air soft game just have the joy stick and mount a laser on on the gun can t run without the pc <br>
That was awesome :D
omg, thank you sooooooooo much for that diagram and showing the actual required components , lol, sometimes saying u need a transistor is not enough, but you have shown which ones, so thanks again
Does it have to be an Arduino Mega or can it be any other Arduino because I kind of have a tight budget.<br><br>-TheWaddleWaaddlle
It can be any Arduino. Changing Arduinos could potentially cause some unforeseen changes though. I chose the Mega just because it has a lot of ports and chances are you won't run out.
Where does the red wire from the Arduino Digital Out Prt go to or is it just not used?<br><br>-ThewaddleWaaddle
It is not used. You can simply cut it off.
wow it's cool project....<br>how about using openCV ?...its can more interesting, i think
Did you modify the VEX radio receiver to become a housing for the BlueSMIRF? How did you attach a duck antenna onto a BlueSMIRF?
Yes, I opened up the VEX radio receiver and took out the electronics. Then I mounted the BlueSmirf in the &quot;hollowed out&quot; radio receiver. I did this just to make it easier to mount the BlueSmirf on any VEX metal. As for the duck antenna, I bought this <a href="http://www.sparkfun.com/products/158">adapter</a> which fits perfectly with this <a href="http://www.sparkfun.com/products/145">duck antenna.</a><br>
Nice!<br><br>Love to see a subsequent ible incorporating autonomous control- robot sentry bot!
Great work!<br> <br> This is the first of the sentry ible's that can actually convince me to build one!<br> <br> Although perhaps it would be more accesible if you could perhaps make a &quot;sentry for dummy's&quot; ible because some of the steps like building the gear frame and the electronics aren't really accesible for an amateur noobie like me...<br> <br> Also a tip, put the video also on the first page ;) with it on the first page you'll avoid show us a video of it comments and it'll generate more attention and traffic :)
Wow really cool! Can't wait to get an Arduino and try this myself!

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