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Note that video to mp3 conversion output is limited to 10 minutes.
this is how to make a better version of the bristlebot. you can get a pager motor from ebay, or other shops like www.solarbotics.com if you have a bare pagermotor you need to glue a small weight on one sido of the motor's shaft, like a small nut or other metal piece.
this video has also been requested for me to do for a long time by a lot of people, so here you go.