In Microchip application notes AN529, it show an example of industrial clock. A speaker was wiring to RA0 of PIC16C57. As a typical speaker have an impedence of 8-ohm. I am wondering are I/Os of 16C57 could sufficiently drive the speaker. Am I missing anything? Thanks in advance. WH Tan -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body