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Re: Wireless keyboard, 4800bps possible?

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On Fri, 4 Jan 2002  wrote:

> >Does anyone know if PS/2 or a Twiddler I needs 9600 ?
> 
> Try listening to the serial port and click some keys... If it's sending
> plain ascii down the line then I'd say there'd be no noticable difference.
> It should be pretty obvious what the bandwidth used is like. I suspect there
> will be only 1 character (8 bits) per keyclick, giving you (at 4800 baud),
> 600 characters per second (evenly spaced, say 600 potential character
> "slots" per second).

	The twiddler I uses 2400 baud - not sure if it can use others.

	Some time ago I made my twiddler I wireless.  I have it working,
but don't use it much since I don't actually like chording keyboards.  But
it worked just fine.

	This link should get you to my page on it (old-timers on the list
will doubtlessly have seen it before).

	http://aeinnovations.com/content.php?menu=904&page_id=18

	There is also a link to the full schematic.

	Ralf Ackermann has also done wireless twiddler work using the same
rf tx/rx pairs.  His implementation differs from mine, so check his stuff
out too.

Don Papp
http://aeinnovations.com

GPG/PGP Key: http://aeinnovations.com/downloads/pubkey.html

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