Subject:
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Re: tuch sensitive sensor
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 22 Dec 2003 20:18:20 GMT
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Original-From:
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Steve Baker <sjbaker1@airmailNOSPAM.net>
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Viewed:
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737 times
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Xyvind Steinnes wrote:
> Another aplication is a piano. Tuchsensitve sensor under each keys, and the
> piano knows how hard (fast) you have tuched the keys and kan make the volume
> of the tones acording to that.
The cheaper music synthesisers (and perhaps the expensive ones too) do this
by having two simple switches - set to switch at different points in the key's
travel. All they do is measure the time between the first switch triggering
and the second switch triggering.
Measuring the time it takes the key to move over that distance allows you
to calculate the average velocity over that distance between the two
switches. Knowing that the key was stationary at the 'zero' point gives
you a way to estimate it's accelleration - which tells you how much force
was applied to it.
There is no pressure or other 'special' kind of switch in most cases.
---------------------------- Steve Baker -------------------------
HomeEmail: <sjbaker1@airmail.net> WorkEmail: <sjbaker@link.com>
HomePage : http://www.sjbaker.org
Projects : http://plib.sf.net http://tuxaqfh.sf.net
http://tuxkart.sf.net http://prettypoly.sf.net
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Message is in Reply To:
 | | tuch sensitive sensor
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| Hello folks, I just come up with an idea, maybe there is a sensor like this made already... I'm thinking of a tuchsensitive sensor. Not the on/off type or with only one resistor value. I'm thinking of a tuchsensor that can register how far the (...) (21 years ago, 22-Dec-03, to lugnet.robotics)
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