>   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.

        Simple as it can be ;o)

        We stopped using the AND gates as "controlled switches". Done that, you=
 need to MIX or to SELECT the output? If you just want to mix the output=
 (since only one will be connected at any given time), you just put an OR=
 gate after the two AND gates ;o)

        Don't forget to connect unused inputs to ground!


---8<---Corte aqui---8<----

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

---8<---Corte aqui---8<----

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