/**
  \example timer1.cpp 

  This sketch uses a timer to blink the red LED every two seconds
  (precisely).  It uses \c Timer1, but that could have been \c Timer2
  or \c Timer3 just as easily.

  The overall behavior of a timer is specified by two parameters: How
  fast it 'ticks', in terms of microseconds per tick, and how many
  ticks before it 'laps' or returns to zero.

  By default, a timer ticks once every 1,000 microseconds -- which is
  a millisecond, one thousandth of a second, so by default a timer
  ticks 1,000 times in one second.  Also by default, a timer laps
  after 1,000 ticks.  So, 1/1,000 second per tick times 1,000 ticks
  per lap produces one second per lap, which is just what we want in
  this case.

 */
