At 11:09 PM 2/13/02 +0000, Dave Dilatush wrote: >Dwayne Reid wrote... > > >Close, except turn the diodes around. > >The diodes are connected properly. > >If you go back and read my earlier post, which explains in detail how >the circuit operates, that should clarify things. Hmm - I don't seem to have received that post. I had assumed your post was in response to the posts I made on the 9th and 11th - almost the same circuit, except that the diodes in my version are reversed with respect to yours, and I have pullups on both the rows and columns. dwayne Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax Celebrating 18 years of Engineering Innovation (1984 - 2002) .-. .-. .-. .-. .-. .-. .-. .-. .-. .- `-' `-' `-' `-' `-' `-' `-' `-' `-' Do NOT send unsolicited commercial email to this email address. This message neither grants consent to receive unsolicited commercial email nor is intended to solicit commercial email. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.