Just trying to gather a bit of information for a competition between a few other NXT builds, I was wondering if there was a way to make the ultrasonic sensor completely useless for the competition as I'm sure it would put a new spin to my opponents.

  • 3
    Isn't that... cheating?
    – shea
    Nov 2, 2012 at 19:26

1 Answer 1


Since everything is fair in love and war, you could do this:

Using an Arduino and this NXT compatible shield, you could program it to send a continuous burst at 11494,253Hz creating noise in the frequency range of the NXT Ultrasonic sensor.

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This site shows how to use the Shield with the sensor. All you have to do is modify the code to create a long burst instead of a controlled ping.

  • 2
    Depending on the contest, non-LEGO material might be explicitly excluded - unless you hide it in your pocket or something.
    – Joubarc
    Nov 29, 2012 at 8:19
  • Assuming of course that it is an accepted countermeasure in that competition. :)
    – pcantin
    Nov 29, 2012 at 12:25

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