Tell me more ×  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.  share|improve this question Isn't that... cheating?
–  bungeshea Nov 2 '12 at 19:26 add comment  1 Answer  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.  enter image
description here  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.  share|improve this answer
Depending on the contest, non-LEGO material might be explicitly
excluded - unless you hide it in your pocket or something. – 
Joubarc Nov 29 '12 at 8:19 Assuming of course that it is an
accepted counterme