Re: Need help with parallel port input design

Thanks Lloyd. I guess I need to understand when it is ok, or
necessary, to use a pullup resistor in relation to the parallel port.
As I understand it, if the parallel output port lines are configured
as open collector, they are necessary. But there is no way to know
what this configuration is, right? Well, I am confused.

Grant

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Lloyd Leung" <lloyd@l...> wrote:
> Dean uses just an hex inverter... the IC itself is CD4069UBCN.
>
> I believe it's only for driving only 5 inputs. Pins 10-15. So only
5 of
> the 6 inverter circuits are being used.
>
>