At the latest MicroChip seminar in Calgary the Advanced Seminar notes
contained a circuit for reading several (16 I think) keys with one pin
(actually 2 as one was a drive pin as I recall). If you want I could locate
the page number and book number for you, however I assume it will be on
MicroChips web site.

If it's OK with MicroChip I could also scan the circuit in and e-mail it to
you.

Guy

-----Original Message-----
From: David Duffy <AVD@UQ.NET.AU>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: Sunday, June 07, 1998 7:51 AM
Subject: Keypad with single pin


>I came across a way to connect a keypad to micro with only one pin;
>It appears in "Electronic Design Online". This is the web version
>of the trade magazine - worth a read and best of all it's free !
>
>http://www.penton.com/ed/Pages/magpages/may0198/ifd/0501ifd.htm#5
>
>Regards...
>
>_______________________________________________________________
>Dave Duffy         Audio Visual Devices           AVD@uq.net.au
>Unit 8, 9-11 Trade Street, Cleveland, Queensland 4163 Australia
>Phone: +61 7 38210362                 Facsimile: +61 7 38210281
>_______________________________________________________________
>