Not exactly what you are looking for but for a prototype lashup you could
extract the wheel from a wheel mouse. Quadrature Digital Output with a
seperate push switch and you have probably got one in your junk box so the
price is right.
(Having had a quick look in my junk box I have come to the conclusion I have
a breeding colony, anyone know how to identify male and female computer mice
so I can seperate them ?)

Regards

Chris Carr

> On Tue, Aug 28, 2001 at 10:44:13PM +0100, Mike Harrison wrote:
> > Rotary encoders are readily available with rotate+push action  - ideal
> > for this sort of application, and you don't need an ADC to read them!
> > Piher and Alps are 2 makes that come to mind.
> >
>
> I also received a suggestion to take a look at some Grayhill encoders that
> Mouser carries. Reasonable at $5 each.
>
> But I think I found a winner in another suggestion I saw today from
> Lawrence Glaister. Cheap light dimmers have this action.
>
> So this evening I scooted over to the local WalMart and ran across a
> pushbutton 3way dimmer for $3.50. At the core it has a 160K pot attached
> to a SPDT switch, a knob, a TRIAC (I presume), and a handful of passives.
>
> It's perfect except for the resistance. I'll probably need a unity gain
> opamp circuit to lower the impeadance for the PIC. Will test soon.
>
> BAJ
>
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