DryerSignal

  The boards arrived from @oshpark!  I assembled one and its working!  Next step is an enclosure.

    Redesigned to drop the voltage regulator and use 3 to 6 volts. Note that you can't 4 AA's as that will exceed ATTiny specs as they each start closer to 1.8v....  so 3 AA's it is!

   I designed and ordered via OshPark will continue when they arrive.

  Initially I wanted to power this with a 9v battery, but the LDO voltage regulators I have draw a quiescent current of 50ua and that would make a 9v batter only last less than 170 days - and most of that power would be waisted by the regulator :-(.   Since the ATTiny85 can run from 2.8->6v I'll remove the regulator and power with three AA's.   *sigh*