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Building instructions for the LEGO Mindstorms attachment using Rubber Bands

This is a ping-ball containing attachment for a World Robotics Olympiad. The attachment is building with LEGO Mindstorms EV3 parts. It is tiltel so that it is easier for the balls to fall off at certain points, which was part of the missions at the 2015 cmpetition. 

Building instructions for this LEGO Mindstorms EV3 attachment for the FIRST LEGO League Nature's Fury robotics competition

LEGO Mindstorms Robot Base for a high placed attachment for containing ping pong balls. It is interesting how the balance is achieved with such an attachment. It was only one of the version in a series of LEGO Mindstorms Robots for World Robotics Olympiad.

Building instructions for the Pinless Rubber Band Attachment:

Building instructions for a LEGO Mindstorms EV3 Active attachment for changing gear orientations

Building instructions for the Rubber Band Attachment

This LEGO Mindstorms Attachment has three gears, one frame and two axles. The goal of the attachment is to use the gears to change the direction in which the motion is transferred.  

A similar LEGO attachment the previous once, but this one is with a different gear ratio. Again using a frame, two axles and two gears you can change the direction of the motion.  

One LEGO gear is powering two LEGO Gears and at the end, from one motor we rotate two axles in opposite directions. Follow the building instructions.

The attachment shows how to do build a pinless robot attachment with LEGO EV3 Mindstorms.

Another example for a quick pinless attachment build with LEGO Mindstorms EV3 robots.