Build: Mindstorms Security System
Need a place to store your most precious lego piece? Now you can sleep soundly because your prized lego piece is guarded by the Mindstorms Security System. When the sensors "see" a hand(or some other foreign object)they tell the motors to put the gem away as fast as possible. It then waits for 15 seconds and brings the gem back out. For more details please watch the video below
Here is the link to the video:
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