In message
,
Mathew Newton writes
What I want to do is be able to do is trigger only a single serving
and, given the somewhat inexact method by which this paddle delivery
method operates, I have decided that my best bet is to somehow detect
the ejection of a bunch of nuts (there'll be less than 10 per serving
i.e. per section of the paddle) once they have left the dispenser.
This detection can then stop the motor turning and await the trigger
for another serving.

Just adapt one of these

http://www.youtube.com/watch?feature=player_embedded&v=rWd3vgLaA_M


--
geoff