> > I am hoping somebody out there in PIC land may be able to help me. > I am currently working on a simple home automation system using multiple > 16C84's (max of 10) fitted with rs232 trancievers as slaves and a PC as > the master controller. I am not sure how to go about connecting all the TXD > lines on the slaves to the PC without causing possible conflicts. This is what I have used on 4 PC system +12V -- / 10kohm \ / \ master-------+-------->|-----------slave1 | +-------->|-----------slave2 | +--- and so on Best regards, Vesku