At 12:27 PM 17/12/2005, you wrote: >RS485 requires three wires but rs232 only needs two. ??? How do you figure that? Let's see RS232 minimum Tx,Rx and return ground. RS485 data+, data- and return ground. If you use a transformer coupled RS485 you don't need ground (2 wires) Regards John Samperi ******************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA Tel. (02) 9674-6495 Fax (02) 9674-8745 Email: john@ampertronics.com.au Website http://www.ampertronics.com.au *Electronic Design * Custom Products * Contract Assembly ********************************************************
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Re: [AVR-Chat] Re: PC COM Ports
2005-12-17 by John Samperi