Lego Mindstorms – NXT Ball Machine    Send article as PDF   
It sorts out the balls by colour and delivers it to the appropriate colour maker along the conveyor belt, before rolling down to elevator which lifts the balls back to the ball bin to start again. This version sorts 6 colours but is capable of sorting 10+ coloured ball with ease. The software that runs the contraption was written in NXC (Not eXactly C) which is available free from BricxCC.


The "NXT Ball Machine" is a Lego Mindstorms Contraption featuring Mindsensors' new Motor Mux (NXTMMX) and Touch Sensor Mux (TouchMux). It also feature HiTechnic's Colour Sensor.  perpetual coloured ball sorting machine uses the following hardware:

  • 1 X Lego NXT Computer Brick
  • 5 x NXT Motors
  • 3 x legacy RCX Touch Sensors
  • 1 x NXT Touch Sensor
  • 1 x NXTMMX
  • 1 x TouchMux
  • 1 x Hitechnic Colour Sensor

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