>1. You did not mention the boundary conditions, but assuming that you want
>to send to two devices from a PC, and the devices do not need the=
 handshake
>signals, you could use one of those to control a relais. With a small
>relais
>you might be able to drive it directly from the RS232 handshake signals.
>Otherwise a T + R + power supply will accomodate almost any relais. But
>don't forget the diode! (That is neither a C nor an R, but still a very
>usefull component, sepecially in this case!)

        Been there, done that. It's easier to use two AND gates, and switch its=
 outputs! I'll scan and post a NMEA signal selector I did some years=
 before, that is something like he wants to do, and everyone will=
 understand




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Alexandre Souza
taito@terra.com.br
http://planeta.terra.com.br/lazer/pinball/

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