 button that takes its control input from a DOF port rather than
   from a physical button.  Or, you can set up a logical output port that takes
   its commands from <i>another</i> logical output port, combining that with
   some other information in a "computed output" formula via the
   <a href="JSONConfigRef.htm#outputs.source"><tt>source</tt></a> property.
</p>

<h4>Flipper logic</h4>
<p>
   You can configure any port with a protective timer that prevents the port
   from being activated for too long at