Let's Make Robots!

Cross the gap.

Winners as voted on by my family as follows below:


Game: Cross the gap.

Objective: Build an autonomous robot that starts completely within a 12 inch by 12 inch by 12 inch square box.

It must then cross a 12 inch gap and stop on the other side without any part of the robot touching the start side when done.

In order to win you must show a video of your robot completing this task, show the robot measurements and gap measurements in the video, and include the LMR logo on the video.

Fastest time to do so, and meet these constraints wins. Timing will start when the robot leaves the start box till its on the second table and not touching the start table. In the event of a tie, or controversy, public vote will decide a winner.


Prize for fastest completion goes to:   antonio.caciuc

  • Freescale 68HC11 microcontroller, 32KB Flash RAM, RS232 serial port programming interface, 2-line by 16-character LCD, Piezo buzzer for sound, 4x DC motor ports, 6x servo motor ports, 9x Digital inputs, 8x Digital outputs, 21x Analog inputs, w/ Interactive C software and code examples.
  • a pair of new metal gear motors
  • some assorted sensors - new unused.




Prize for the robot I find most interesting goes to: Kelpy (I was close to picking the NXT entry, but really liked the fabrication.)

  • A new Parallax Basic Stamp controller, product details can be found on their website, w/ software, cable, tiny breadboard.
  • 1 new unused servo, 1 used servo of same brand.
  • some assorted sensors - new unused.


Prize my family voted for most interesting:    sebathorus  (the first event entry)

What did you win? You will find out soon enough.



I am emailing the winners to send them their prizes. So winners check your inbox.


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I thought of this weakness in my rules the next day......DOH!!!

(I was hoping to see creative robots/solutions to this problem)


But that's ok, I'm not changing the rules. As people are already building entries so we will go with what we have.

However a friend of mine did this a better way than that.

But you will have to wait till after wards for me to post a pictures of how he did this.

Me and another friend built folding bridge robots to solve this problem, which was a lot harder than one would immediately think.



Actually, the folding bridge was my initial thought...similar to the bridge crossing military vehicles....but that be tricky to put down and pick up among other issues. With some creativity, it could be done though. Thats not the direction I'm going in though. I would almost say, for bonus points("awesome award", you could post the other rules to see if it would affect the challenge, sort of an extra challenge that if you want to see if you could do it, but not necessarily have to) I'm curious about the rules you considered in the afterthought...


I'm sorry I can't answer that, as I don't want to influence what people build.


But think about this comp from a different perspective:

Your entries will inspire others to build something.

They will see moving parts, machine's thinking, and want to build one for themselves.

That's the real prize.

Sounds fun.

Cool challenge. Back in my early teenage years I used to love making up contraptions that could cross gaps or scale objects using lego technic.

A question regarding the table tops. Does their make up or material matter? Say, must they be a smooth wooden surface or can it be metal, fabric, cushioned etc..?

I don't care about the tables, just the rules explicitly defined.

Use this undefined table rule to your advantage and build a bot.

You have at some level thought about entering or else you wouldn't have replied to ask a question.

Wink, Wink, Nudge, Nudge!!!


You could take a small robot you already have, then add duel cable launchers like they have in spy movies, then have the robot drive across the cables to clear the gap, then since the table material would be soft for the cables to stick into, you could simply reel them in via worm gear drive. -LOL


Yes that`s one of the ideas I had in mind :) At first I thought of a bridge deploying robot but that has been done many times before. I think I`ll try something a little more unorthodox.

That was my idea but proved to be not the right to way to accomlish such an achievement.

I was just kidding ezekiel181 in my proposed solution (above) but if you did make that idea work, that would be really cool to watch.


Also I was cleaning my closet and found another new "off brand" controller board, so there might be additional prizes pending, once I get through the rest of these boxes.....maybe a prize for most interesting way to solve or something. We will have to wait and see on that.

I teach science and have been collecting robots for years. Thats where this stuff is coming from, in case you were curious.

Why not? I mean, sure, it's not going to be very fast but still... should be a viable solution