Wouter, do you have a link for nc-busbutton info? Googling didn't help to
find out valid info on this approach.
I'm not thinking on a 2-wires bus for this particular project, will use the
Bob / Harold resistor string approach, but knowing more about busbutton will
not hurt and may be useful for other future project.

Thanks

2007/6/29, wouter van ooijen <wouter@voti.nl>:
>
> > Do you see any problem with this approach?
>
> -sensitive to all kinds of interference.
> -pressing a button can take the input voltage "through" the region of
> other buttons
> -did you calculate the required accuracy of the resistors?
>
> > Anybody used something like this before?
>
> yes, I used nc-busbutton so I need only 2 wires and can detect a broken
> wire
>
> > Any other option you can suggest
> > for multiple buttons, 1 pin and no additional circuitry?
>
> no
>
> Wouter van Ooijen
>
> -- -------------------------------------------
> Van Ooijen Technische Informatica: www.voti.nl
> consultancy, development, PICmicro products
> docent Hogeschool van Utrecht: www.voti.nl/hvu
>
>
>
> --
> http://www.piclist.com PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>



-- 
Ariel Rocholl
Madrid, Spain
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist