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



Josh Koffman wrote:
>
> Hi Roman. Actually, it's to get two colours and one switch on only three
> wires. My goal is to remote mount these, and three wires is all I'd like
> to use. As well, I'd like to keep the remote unit as low parts as
> possible as I'd like to try and squeeze it in the shell of a connector.
> > >
> > >          (-|>-)bi colour LED   _=_ Switch
> > >       ,--(    )--,------------o   o--,
> > >       |  (-<|-)  |                   |
> > >       |          |                   |
> > >       |          |                   |
> > >       |          |                   |
> > >       O          O                   O
> > >      1          2                   3
> > >
> > > 1= PIC Output
> > > 2= +2.5 Volt
> > > 3= PIC Input

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