actually a 1% difference can be pretty noticiblle
though mainly in concert with other players but it could throw the "feel" of
a piece off.

while a pot might not be good enough on its own if you make it open loop
with a pot and
a 3 section 7 segment display that shows the number of beats per minute?
then she can set the display to what she wants and any inaccuracy in the pot
dosent matter.

----- Original Message -----
From: "Olin Lathrop" <olin_piclist@EMBEDINC.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Tuesday, April 08, 2003 9:56 PM
Subject: Re: [PIC]: A metronome project


> > 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

--
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