Ashley Roll wrote:
>
> Hi Josh,
>
> Good to see my idea validated by Roman :)
>
> The reason I split the current limiting resistors for the LED was to provide
> some protection to the PIC for Electro-Static discharge and short circuits
> in the cable. To fulfil these requirement, they MUST be located at the PIC.
> And for ease of assembly, the other resistors should be there as well I'd
> assume. I don't think you'll get any benefit moving them to the end of the
> cable.
>
> Roman, this is the circuit I posted:
>                      120
> >  PIN1 >-----------/\/\/\--,
> >                           |
> >            10K       Bi Colour LED
> >   Vcc >--/\/\/\-,         |
> >                 |   120   |
> >  PIN2 >---------+-/\/\/\--+
> >                           |
> >                           0 |
> >                           0 | Switch
> >           4.7K            |
> >   GND >--/\/\/\-----------'
>


Actually I think you should change that
4.7k resistor to about 1k or 1.5k to ensure
PIN2 is pulled sufficiently low to register
a low input condition. :o)
-Roman

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