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This is the Century High School Science Olympiad Robot Arm that competed at the Minnesota 2012 State  Science Olympiad tournament with 32 other teams. I built and ran this remote control robot arm for the tournament, placing 8th (due to unforeseen problems). I am about to graduate high school (in 3 days!) as a legal adult (having turned 18 after the state tournament), and built this over the course of my senior season on the Science Olympiad team. This wasn't my first time dappling in Remote Control Robots, as my previous Instructable, How to Make a Sumo Bot (Science Olympiad 2011 Rules), but was my first time building a robotic arm. 

Here's a brief overview of the competition:

Science Olympiad is a team-based science competition with events ranging from so-called "study events" to "lab events" to the menacing "build events." Robot Arm was one of these "build events." The event consisted of building a Remote Controlled Robotic Arm to pick up as many objects and place them in containers made out of half gallon milk jugs to score as many points as possible during a 3 minute period of time. 

This robot arm is clearly not the most sophisticated or most complicated robot arm ever made, but it gets the job done, while recycling parts, learning about Remote Control systems, and using common (and cheap!) building materials with a few motors to make a functional robot arm to pick up and move things around.
 
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Step 1: Rules of the Competition

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Now for the extended overview of Science Olympiad, and specifically, the Sumo Bots competition:

Science Olympiad is, as I stated previously, a team-based science competition. Competitions include Invitationals hosted by schools around the state, Regionals, State, and Nationals. According to the Science Olympiad National website, soinc.org, Science Olympiad has been around for 28 years, and "has led a revolution in science education." Teams, for Division C (high school division), are made up of 15 members, who participate in multiple events, usually with different partners for each event. Events range from "lab events", such as Chemistry Lab and Forensics, to "study events", such as Ornithology and Fossils, to "build events", such as Gravity Vehicle and Robot Arm.

For Robot Arm, specifically, the robot has specific construction parameters, required documentation, a specific competition area and competition details, and a unique scoring system, as the two rule sheets outline.
jasminezhang2002 says: Jul 3, 2012. 8:57 PM
its awesome but can it move.
AlphaFire (author) in reply to jasminezhang2002Jan 4, 2013. 12:13 PM
Yes. Check out step 18 for a demo video.
titanwrex says: Dec 20, 2012. 5:43 PM
thanks for the build! how much mah does the battery need? im looking to buy a 1500mah one, is that enough?
AlphaFire (author) in reply to titanwrexJan 4, 2013. 12:12 PM
My battery is rated at 1500mah, and that seemed to work for my purposes.
wooohhhoooo9 says: Aug 25, 2012. 1:28 AM
This really helps me and i can't stop crying now! :D
V0R73X says: Jun 27, 2012. 9:19 PM
Nice! I also published an instructable for a Science Olympiad robotic arm (it's displayed on the side says by V0R73X) but mine was Bluetooth controlled, and not as good as yours! xD I generally had problems designing the grip architecture, so I used hair clips! =D and I guess it was too complicated for an instructable and lack of good vids/pics... anyways nicely done!
Pyrotechnic-Robot says: Jun 19, 2012. 7:09 PM
Very nice job on this project! I too am in Science Olympiad and I just love it. I too was in this event and it was a job to keep this event in budget and functional. For all the work that we put in, it will be a shame to not have it next year.

It is such a great time and i hope your team had a good season! Keep up the great work!
Husham Samir says: Jun 17, 2012. 1:52 AM
excellent work!!!
TheHawkeye says: Jun 13, 2012. 9:57 AM
I remember doing this for the Science Olympiad as well! So much fun.
scoochmaroo says: Jun 8, 2012. 10:50 AM
Wow, so cool. You should consider entering this in the Father's Day Challenge!
shaun117 in reply to scoochmarooJun 9, 2012. 12:04 AM
yes theay should
AlphaFire (author) in reply to scoochmarooJun 8, 2012. 11:13 AM
Sure, why not? Even though it was a while ago, my dad helped me quite a bit with this, so I suppose the "present" was our time working together.
Lectric Wizard says: Jun 7, 2012. 7:17 AM
Very cool ! Watching the video I noticed it tended to wobble a lot. Last night I found the perfect fix in one of my junk boxes. It was a rotatry bearing for "lazy Susans". With one mounted on a platform & the drill going up thru the middle the bearing would take the weight & stiffen up the whole arm. Just a thought incase you make MARK II.
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AlphaFire (author) in reply to Lectric WizardJun 7, 2012. 8:08 AM
That's a great idea! Thanks! I may just incorporate that into the next version (hopefully with a better motor for rotation--a less "jerky" motor).
megaduty says: Jun 7, 2012. 7:27 AM
I have that exact pincer kit and have yet to work it into a project. Thanks for the ible.
AlphaFire (author) in reply to megadutyJun 7, 2012. 8:07 AM
No problem! The claw works well, the only issue is the assembly...it's a little bit of a headache.
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