What is on Chow-Miller’s Blog

Big Frontier Middle School hello to everybody.  This blog is to help me keep track of all the cool stuff that’s going on in my classroom and in and around my educational world.  I may post stuff that’s going on in class, or cool things I find out about robots, technology, etc.  Fell free to send me an e-mail or drop a comment.


4 thoughts on “What is on Chow-Miller’s Blog

    • Hi Evelyn. I have a class of about 32 that I am using the littleBits with. I have purchased kits and individual bits. I don’t recall exact numbers but I have about 2 Intro Kits, three deluxe kits, 2 synth kits, and a bunch of extra bits and accessories. I also purchased one Smart Home kit.

  1. You work with Lego EV3s quite a bit. I read your post “A week in the life” having your kids build a dragster and uphill climber. I would like to do the same but am using the nxt bots. EV3s look alot easier to attach gearing and motors to. I’m having trouble and I’m sure there’s a fairly easy way to attach them. I would like to show the students examples. Do you have any helps or suggestions where I can look for examples on upgearing and downgearing for the NXTs?

    • Hi,

      Thanks for reading the blog. Unfortunately I don’t have a great answer for you. The EV3 motors are a significant improvement over the NXT motors in one particular aspect. That is if you attach a #15 beam to the three holes at the back of an NXT motor, one of the holes on the other end of the beam will not perfectly (almost, but not perfectly) line up with the center axle hole of the orange part of the motor that spins. This will cause any axle placed through the motor and an attached beam to bend slightly. I have had students successfully use this method anyway. With an EV3 it is easier though because the holes do line up perfectly and this was intentional when the motors were produced. That all having been said, here’s my suggestions: first build the meshed gears attached to the NXT motors without worrying about the wheels or whole robot. Most students limit themselves by attaching the motors to the bricks first. By experimenting with ways of meshing gears on an unattached motor, you open up more possibilities. I find that stacking gears vertically does not work as well as lining them up horizontally. Also I would look at some of the work of Yoshihito Isogawa (not his EV3 book) as he has a lot of ways of meshing gears that you may be able to apply. Search for Tora No Maki to find some of his work. Good luck and let me know how it turns out!

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