The battle on the Grund

Programming level 1

Build The Grund with a mechanical catapult

P1

How to build

Grund with a mechanical catapult

  • Build The Grund – woodstacks, little figures, buildings, gates, etc.
  • Build a mechanical catapult turning on an axle.
  • Affix the axle to various points of the launching arm, and see how far the projectile can be launched with each point.

P1

The Grund with a mechanical catapult

P1

Programming level 2

Build a controlled catapult

P2

How to build

Controlled catapult

  • The catapult should be moved by a servo motor
  • It launches at the press of a Touch sensor
  • A LED should flash while launching
  • After launching, the arm should be moved back to the starting position automatically

P2

Controlled catapult

P2

P2

Programming level 3

Build a load-controlled catapult and a trumpeter

P3

How to build

Load-controlled catapult and a trumpeter

  • The catapult should be moved by a servo motor
  • It should launch after a projectile is put into its bucket – an IR Photoreflector should detect it
  • A LED should flash while launching
  • After launching the arm should be moved back to the starting position automatically
  • Build a robot car and add a trumpeter on top of it.
  • The arm of the trumpeter is moved by a servo motor – it can lift up its hand holding the trumpet
  • Moving around, he should blow his trumpet – playing a tune with the Buzzer
  • The trumpeter should be started by whistling or clapping that is detected with a Sound sensor

P3

Load-controlled catapult and a trumpeter

P3

P3

Programming level 4

Playing out the battle

P4

How to build

The battle

  • Build all the objects and robots listed in P1-P3
  • Build a flagpole with a flag
  • The flag-raising mechanism can be built from a servo motor, a gear and a driverail
  • The raising starts at the press of a Touch sensor

P4

The battle

P4

Trumpeter

Flag

Flag & the Trumpeter

P4