Rubber Band Shooter / Minifigure Launcher

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Introduction: Rubber Band Shooter / Minifigure Launcher

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This is how to make a rubber band shooter and minifig launcher with a lego mindstorms nxt kit and some extra legos.

Step 1: Building

Click on the lfx file (lego digital designer) and when it is open click f7 for buildign instructions. You can download the lego digital designer program from lego.

Step 2: Controls

The orange button makes the shooter move up and the left touch sensor makes it move down. The left arrow button makes it move to the left and the right arrow button makes it move to the right. The right touvh sensor makes it fire.

Step 3: "bent" Gear

The gear in the picture is bent back slightly and so in the lfx file it isn't on right. Put it on like it is in the picture.

Step 4: Attachment for Minifig Launcher

All you have to do is put a pin through the thing where the rubber band goes and it is a minigif launcher. You have to do the is otherwise the rubber band comes of to and the mini fig doesn't go as far. It shoots about 30 to 40 feet.

Step 5: Best Way to Launch

The best way to launch a minifig is to have its hands in the air and make it sit down. Also it works best with 2 rubber bands.

Step 6: Programming

The program is the same for both the rubber band shooter and the minifig launcher.

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    user

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    10 Comments

    i dont have the gear from the motor on top
    is there a way to do this with 2.0

    I know why it doesn't work. the computer saves as a TMP file, not a LXF file. you may want to fix that.

    user

    Please post a video!!! If you demolished the thing just use your great instructable!!!!!!!

    I think I took some videos of it when it was still together, so i will post those soon, if i didnt delete them

    the problem I got was it was made in the old digital designer and couldn't be opened because of the old format

    The lego digital designer file dosnt work :( please email it to me at wangtrevor@gmail.com

    the reason that it doesn;t work is most likely because you don't have the software installed on your computer.

    i have lego digital designer installed

    i have it installed its called ldd or lego digital designer and u can use creator lego model and stuff