Subject:
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RE: touch sensors aren't just switches (was Re: ideas for a RIS 2.0
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 25 Aug 1999 01:18:43 GMT
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Viewed:
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2178 times
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> > I wonder why LEGO designed the touch sensor that way and then made the
> > programming environment ignore it?
>
> Many "buttons" in today's electronic devices are designed that way. Check
> your TV remote control, your key-chain remote control for your garage door
> opener or car alarm, the buttons on your phone etc. It eliminates the need
> for a physical switch.
As you may guess, cost is the driving factor. In one project for a desk fan
(it's the Brookstone Battery Operated Desk Fan in case you care) the rubber
switch for three buttons and custom molding cost 8 cents! per switch in
quantity 20,000. The one time die charge was something like $5000. So these
switches are CHEAP!!!
As Tilman suggests, they are not really very good for guessing how HARD
something is being pressed...
Cheers,
Ralph Hempel - P.Eng
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Check out pbFORTH for LEGO Mindstorms at:
<http://www.hempeldesigngroup.com/lego/pbFORTH>
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Reply to: rhempel at bmts dot com
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