Close up of train buffer with Mindstorms touchsensor stop

Below you find a closeup of the train buffer with the Mindstorms touchsensor. If the wagon hits the buffer, the NXT brick sends a message to the train that it should stop, and to proceed to the decoupling phase.

Train buffer

In the Youtube video you see a test run:

  1. Train drives towards the train buffer
  2. Wagon hits the buffer
  3. NXT brick sends message to the NXT on the train.
  4. Train stops
  5. Train starts decoupling of the wagon
  6. Train drives away

Note: in the final version, the train should slow down before hitting the buffer stop.

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