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Pallo, from ancient Greek, means to throw or to hurl, which is a part of the modern name "catapult".

Pallo is a robot made of two parts. The first part of the robot is the catapult! It has no electronic parts and uses two rubber bands to shoot a projectile to the second part. The second part is the target. It has a color sensor, which through a piston with different colored sections, determines how accurately the target has been hit! Good luck with the shooting!

Building instructions for the LEGO Mindstorms EV3 Catapult. The robot has a motor, a clutch to control it for manual shooting and a touch sensor for automatic loading. The bottom base is removed which means the Catapult could not be turned around. Nevertheless, the baseless robot is small enough to be built in class.

This attachment is meant to be built on the robot Francesco 2. When the red connector for the transmission connects the two axles for the rear gear wheels, the differential locks and the motor starts evenly transferring its power to both wheels.

When the red connector for the transmission is pushed to the side, the differential unlocks and once again transfers its power to the wheel with least resistance.

You can see empty beams hovering over this attachment. They are there so you can attach a lever construction over it, to help with the locking and unlocking of the differential. Similar leaver can be seen in the robot Catapult.

Building instruction for both EV3 and NXT. The whole catapult is build in exactly 78 steps.

Building instructions for a LEGO Mindstorms Catapult Motor and Touch Sensor that are used for triggers for firing objects