Subject:
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Re: Sensors
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 16 Feb 1999 14:14:48 GMT
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Original-From:
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alex wetmore <[alex@]stopspam[phred.org]>
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Viewed:
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1179 times
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On Tue, 16 Feb 1999, Jasper Janssen wrote:
> Most keyboards available today use two sheets of plastic with
> electrical pathways on them, whioch are connected beneath the keys
> when pressed. Older ones often have a PCB with copper islands that are
> connected by a bit of tinfoil when the key is pressed. In fact, I have
> only in one instance seen keyboards with separate switches: BBC
> Microcomputers used 'em. However, if you find a BBC, and tear upo the
> keyboard for this, mail me the motherboard - and a return address for
> the mail-bomb that would deserve .... :-/
Old PCs with very klicky keyboards generally used ALPS-brand key
switches. IBM keyboards are the classic brand here, but I've had
NEC keyboards of the same design, and the old Northgate Omnikeys
also used ALPS switches.
You are correct though, most modern keyboards don't.
alex
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message is in Reply To:
 | | Re: Sensors
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| (...) Beware. Little to no keybards actually include separate switches. Most keyboards available today use two sheets of plastic with electrical pathways on them, whioch are connected beneath the keys when pressed. Older ones often have a PCB with (...) (25 years ago, 16-Feb-99, to lugnet.robotics)
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