[simpits-tech] To gene or any other programmer

[fitchett]

Nope - as it is scanned, row 'a' is driven, and a positive result is
received on column '2'.  Ergo, 'a2'.

row 'b' is driven next, positive results are seen on columns '1' and '2'.
So, 'b1', 'b2'.

The catch is that every switch needs a diode on it, with the row->anode,
column->cathode.

Chester


> Example
>
>   1 2 3 4
> a - X - -
> b X X - -
> c - - - -
> d - - - -
>
> How can you get all 3 key states (b1,b2,a2) ?
>
> /Stig
>
> > > and bestides that, if you are using a matrix of switches,
> > you might have
> > > problems with toggle switches - most of the matrixes i've
> > looked at is
> > > designed for momentum switches (connect and release), and
> > will losse a
> > > hole row if you have a toggle in that row...
> > >
> >
> > If designed incorrectly, a scanning matrix will exhibit this
> > behavior.  If
> > constructed with diodes, it isn't a problem, and the entire
> > matrix can be
> > decoded.
> >
> > Chester
> >
> >
> > _______________________________________________
> > Simpits-tech mailing list
> > Simpits-tech@simpits.org
> > http://www.simpits.org/mailman/listinfo/simpits-tech
> > To unsubscribe, please see the instructions at the bottom of
> > the above page.  Thanks!
> >
> _______________________________________________
> Simpits-tech mailing list
> Simpits-tech@simpits.org
> http://www.simpits.org/mailman/listinfo/simpits-tech
> To unsubscribe, please see the instructions at the bottom of the above page.  Thanks!
>