>    I appreciate your input 1st and foremost. I am new
> to designing circuits, and was looking to see if there
> is a general rule of thumb. What I am looking to do is
> get input from one serial (232) input and using an AND
> gate switch between two outputs using a PIC to set the
> second input of the gate high (the 232 input on the
> other.) I know I cannot simply wire them straight
> together, I will need some resistance and capacitance
> somewhere, I was trying to figure out where without
> having someone else answer the question for me.

I don't realy follow what you want to do. Try do describe what you want to
do (switch between two RS232 inputs?) not how you intend to do it (using an
AND gate). That way you might get other solutions, which can be remarkably
simpler that your (or my) first thoughts.

Wouter van Ooijen

Van Ooijen Technische Informatica: http://www.voti.nl
Jal compiler for PIC uC's:  http://www.voti.nl/jal
PICs kopen? http://www.voti.nl/shop

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