> There does need to be a way to enter a speed and to display the speed.
> LCD might be a bit of overkill -- probably just three 7-segment
> displays would do it.

An LCD is probably easier if you use one of the 16C9xx chips.  These can
drive a raw LCD glass directly.  It will also use far less battery power
than LEDs.

> A pot would probably work but for piano practice
> my daughter says that she has to be able to set the metronome to an
> EXACT speed, and it would seem like an analog pot would be kind of iffy
> for  that.

This is obviously rediculous.  Clearly you will never attain an exact
speed.  There must be some tolerance to speed error.  Does it really
matter if she practices the piano piece 1% too fast or slow?  Probably
not.  She probably wouldn't even be able to tell.  What about 5%, 10%,
25%?  Somewhere there is a true error tolerance.  You won't be able to
evaluate different designs until the specs are clear.  Even an
inapplicable math guy should be able to explain this to an artist.  (Hmm,
on second thought...)


*****************************************************************
Embed Inc, embedded system specialists in Littleton Massachusetts
(978) 742-9014, http://www.embedinc.com

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics