Picture of Remote Control Robot Arm
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.

What is the total cost?I am looking for a robot arm that is inexpensive enough for me to buy.Who konws something about it?

You can buy a uram robot arm, but you can get a better robot arm from here:


JackL924 days ago

What a good DIY robot arm!!

What is the total cost?
JaChieo35 months ago

how much is the cost of this project?

and what are the parts

its awesome but can it move.
AlphaFire (author)  jasminezhang20022 years ago
Yes. Check out step 18 for a demo video.
titanwrex2 years ago
thanks for the build! how much mah does the battery need? im looking to buy a 1500mah one, is that enough?
AlphaFire (author)  titanwrex2 years ago
My battery is rated at 1500mah, and that seemed to work for my purposes.
This really helps me and i can't stop crying now! :D
V0R73X3 years ago
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!
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!
excellent work!!!
TheHawkeye3 years ago
I remember doing this for the Science Olympiad as well! So much fun.
scoochmaroo3 years ago
Wow, so cool. You should consider entering this in the Father's Day Challenge!
yes theay should
AlphaFire (author)  scoochmaroo3 years ago
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.
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.
AlphaFire (author)  Lectric Wizard3 years ago
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).
megaduty3 years ago
I have that exact pincer kit and have yet to work it into a project. Thanks for the ible.
AlphaFire (author)  megaduty3 years ago
No problem! The claw works well, the only issue is the assembly...it's a little bit of a headache.