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

Picture of 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

Picture of
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

Picture of 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

Picture of 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.
i dont have the gear from the motor on top
is there a way to do this with 2.0
ario566 years ago
I know why it doesn't work. the computer saves as a TMP file, not a LXF file. you may want to fix that.
not the autors fault its a bug in instrutables
TOCO6 years ago
Please post a video!!! If you demolished the thing just use your great instructable!!!!!!!
JaredsProjects (author)  TOCO6 years ago
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
wangtrevor6 years ago
The lego digital designer file dosnt work :( please email it to me at
JaredsProjects (author)  wangtrevor6 years ago
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