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Alec Aivazis edited intro.tex
about 9 years ago
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\section{Introduction}
There were two main parts to the stopwatch: the controller which handled the state of the counters, and the counter itself. The main obstacle that I encountered while designing this circuit was to find a way to have the same button perform two different tasks. By implementing the controller using a finite state machine, I could easily trigger the transition between the various states off of the same input. Another difficulty I encountered was that the inputs were staying high longer than the transition time, causing two transitions to happen back to back. In order to prevent this, I attached the button to a positive edge trigger which only sent a short burst.
