The DG series of mux chips ought to work though - you could do it with a = DG413, although powering it from the 232 port might be interesting.... On Tue, 29 Apr 2003 17:43:48 -0300, you wrote: >Only checking if anyone is awakened ;-) > >Dwayne Reid wrote: > >> At 08:49 AM 4/29/03 -0300, Francisco Ares wrote: >> >>> AFAIK, RS232 may have signals as high as 12 V positive *AND* = negative, >>> so the 4066 should have its power supply of at least 24 V and its Vss >>> pin at -12V refered to the system ground. >> >> >> I see that you enjoy the sound of chips exploding like firecrackers. = Do >> keep in mind that the absolute maximum voltage between Vdd & Vss is >> either >> 15 Vdc or 18 Vdc, depending upon manufacturer. Applying 36 Vdc >> between Vdd >> & Vss is going to cause interesting things to happen. >> >> dwayne >> >> -- >> Dwayne Reid >> Trinity Electronics Systems Ltd Edmonton, AB, CANADA >> (780) 489-3199 voice (780) 487-6397 fax >> >> Celebrating 19 years of Engineering Innovation (1984 - 2003) >> .-. .-. .-. .-. .-. .-. .-. .-. .-. .- >> `-' `-' `-' `-' `-' `-' `-' `-' `-' >> 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. >> >> -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.