It is impossible. Try to use a LM386 between the PIC and the speaker! I hope this helped, Eduardo Garcia ----- Original Message ----- From: "WH Tan" To: Sent: Wednesday, November 26, 2003 5:18 PM Subject: [PIC]: Driving a speaker? > 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 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.537 / Virus Database: 332 - Release Date: 06/11/03 -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu