Vasile Surducan wrote:

> > with no error. I'll put up the schematic and
> > software soon. The good news is that the new
> > system will interface 12 key pad to 2 PIC pins,
> > and a 16 key pad to 2 PIC pins, saving one or
> > two pins over the first design. :o)
> > -Roman
> >
>   Why do not use a standard PC keyboard, it has much many keys
> and requires only 2 pic pins... available also for strong users.
> The challange will be 0 pic pins keypad and 0 pins bootloader...

But I need to attach a commercial 12-key keypad
to a PIC with no external parts, apart from a few
resistors and 2 caps and 2 PIC pins...
-Roman

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