Mcgee, Mark=C2=A0wrote:

> > > I assume the toggle switch is a SPDT so each input=20
> > > can be connected to one of two lines? =C2=A0
> Yes, it is a SPDT, so I could just wire up +5v one side,=20
> and gnd the other, and not need the pull-down resistor? =C2=A0
> Can't hurt to put one in anyway though, just for the moment=20
> the switch goes 'floating'? =C2=A0I assume a capacitor won't be
> able to help de-bounce things a bit? =C2=A0

With SPDT and Schmidt trigger PIC inputs you can build bounceless
input by design ;-)

> I'm using PIC16F628A=E2=80=A6=C2=A0
> I'm actually going to hook the switch up to 1.5v as=20
> an input to a 1.5v temperature module with LCD=20
> display (maplin FE33L), and share this input with
> PIC, together with four 1.5v level data lines from the=20
> FE33 through a level shifter (1.5v-5v, actual IC TBD,=20
> but considering MAX3001E, but it's TSSOP packaging...),=20
> so I suppose it depends on the level-shifter's outputs=E2=80=A6

FE33's max speed is 1 measurement per second, so=20
clock at max is about 1 kHz, I think. At this speed you can
use A/D inputs instead of the level shifter.


Mike,
just a suggestion.

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