I remember a rotary encoder
from Grayhill. a pic can read
the turns and a momentary
contact push button built in
the knob shaft can select it.

regards,
Robert Francisco
----- Original Message -----
From: Byron A Jeff
<byron@CC.GATECH.EDU>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Tuesday, August 28, 2001
6:15 AM
Subject: Need help locating
unusual part


> I have a couple of
applications where I need
simple and compact local
control.
> I've settled on a
potentiometer and switch
arrangement where the pot
selects
> the desired value and the
switch locks the value in and
advances to the next
> input. I'm about halfway
through my testing.
>
> I realized that two separate
components are really not
necessary. All I need
> is a pot with an integrated
switch. This would both reduce
the space required
> for the user interface and
simplify the interface because
it can then be
> operated with one hand
without having to move that
hand from one component to
> the other.
>
> But after searching for a
bit I also realized that the
commonly
> available component doesn't
really meet my need.  Common
pot/swtch
> combos are organized an a
volume/power knob type
arrangment.  The
> switch clicks on/off at one
end. What I need is a switch
that can be
> pushed with the know set in
it's current position.
>
> I'm envisioning operation
where the interface is
activated bu pushing the knob.
> The display will flash the
value to be set. The knob is
turned to the desired
> value. Then the knob is
pushed again to set the value
and advance to the next
> one. Once all the values are
set the interface is
deactivated until the knob
> is pushed again.
>
> My two immediate
applications are setting the
time on my sunrise/sunset
> controller and a
programmable thermostat I'm
putting together. But clearly
> it has applications in
dimmers and any other kind of
control interface where
> the switch indicates
start/advance/completion and
the pot sets the value.
>
> So does such an item exist?
>
> Let me know. TIA.
>
> BAJ
>
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