Robotics : 6539


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Subject:	RE: touch sensors aren't just switches (was Re: ideas for a RIS 2.0
Newsgroups:	lugnet.robotics
Date:	Wed, 25 Aug 1999 03:28:57 GMT
Viewed:	930 times

> I think it also removes the need to eliminate "keybounce", the annoying thing > that happens with real switches due to dirt on the contact surfaces and tiny > arcs (sparks) just before initial contact. The actual source of bounce is NOT the arc just before contact. It actually is the bouncing of the contact due to the action of the spring in the contact! Well, if you were switching a really high voltage through a small switch, you would get arcing, and then eventually the contacts would either weld shut or carbon would form an insulator and the switch would never really close. Oh, what a fickle thing it is when we mix mechanics with electronics... Cheers, Ralph Hempel - P.Eng -------------------------------------------------------- Check out pbFORTH for LEGO Mindstorms at: <http://www.hempeldesigngroup.com/lego/pbFORTH> -------------------------------------------------------- Reply to: rhempel at bmts dot com --------------------------------------------------------

Message has 1 Reply:

		Re: touch sensors aren't just switches (was Re: ideas for a RIS 2.0
(...) That obviously depends on what type of physical design is used for the switch. Some switches are not capable of bouncing the way you describe because there is no impact or acceleration during contact (example: slide switches that move leaf (...) (25 years ago, 25-Aug-99, to lugnet.robotics)

Message is in Reply To:

		Re: touch sensors aren't just switches (was Re: ideas for a RIS 2.0
(...) I think it also removes the need to eliminate "keybounce", the annoying thing that happens with real switches due to dirt on the contact surfaces and tiny arcs (sparks) just before initial contact. Regardless, it seems to me that I'll do (...) (25 years ago, 25-Aug-99, to lugnet.robotics)

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