CS 444 - Week 3 Lecture 2 - 2015-02-05

*   tachometer 
    *   an instrument that measures rotation

    *   there is a NXTRegulatedMotor method
        getTachoCount
	that returns the amount of rotation in
	degrees

    *   setSpeed - expects an int, given in
        degrees per second

*   in package lejos.util, there is a Delay class,
    and it has the method msDelay that expects	
    an int delay given in milliseconds
    (so 1000 milliseconds == 1 second)
    and delays the calling thread of execution
    for that many milliseconds

    (and a motor can keep running even if
    the current program's main thread is
    paused...)
    *   [as we mentioned in lab the next day --
        Week 3 lab -- this is because there
	is a SEPARATE regulator thread
	regulating the speed of the motor!]