Hi-
How 'bout this, same as Roman's, but use a Normally-Closed Switch in series
with the LEDs.  Only uses 2 lines.  Disadvantage is that the LEDs will
extinquish when toy push the switch.  Actually its a feature, it gives you
feedback ;-)  I don't think you even need the 33k, do you?
David H

     +5v -------*----------------
                  |
 ------,          |                        Bi-colour LED
       |    220   |
     A *------R---|------------------NC switch--,
       |          |              1              |
       |          |                          ,--*--,
 PIC   |          |                          |     |
       |          R 33k                green -     v  red
       |          |              2           ^     -
     B *----------*-----------------------,  |     |  Bi-colour LED
       |                                  |  '--*--'
       |                                  |     |
 ------'                                  '-----*

 A high, B low = RED
 A low, B high = GREEN
 (both inputs) B reads switch

Roman Black wrote:

> I had a think about it and this only took me about
> 30 seconds (1st doodle). :o)
>
> Solution: (3 resistors, no parts in remote)
>
>        +5v -------*----------------
>                   |
>  ------,          |                        Bi-colour LED
>        |    220   |
>      A *------R---|-----------------------------,
>        |          |              1              |
>        |          |                          ,--*--,
>  PIC   |          |                          |     |
>        |          R 33k                green -     v  red
>        |          |              2           ^     -
>      B *----------*-----------------------,  |     |
>        |                                  |  '--*--'
>        |           ,--R----------------,  |     |
>  ------'           |   3k3       3     |  '-----*
>                    |                   |        |
>                    |                   |        |
>                    |                   |       Switch
>                   gnd                  |        |
>                                        '--------'
>  A high, B low = RED
>  A low, B high = GREEN
>  (both inputs) B reads switch
>

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