[simpits-tech] Avionics knobs

[rob]

Hello,
I might be interested in a few of those encoder set-ups to hook to my
hagstrom. Any idea on a cost yet?
Rob
----- Original Message -----
From: "Matt Bailey" <mattb@rtccom.net>
To: <simpits-tech@simpits.org>
Sent: Thursday, October 24, 2002 6:48 PM
Subject: Re: [simpits-tech] Avionics knobs


> Sounds interesting. Encoders seem like overkil for my project though,
> unless they would be more accurate, ie letting you flip the knob very
> quickly without skipping updates to the computer.
>
> I can think of many uses for the second unit you describe...mag switch,
> avionics input selectors, radar range, EFIS map settings, etc etc etc...
>
> -Matt Bailey
>
> "Alan D. Mazurka" wrote:
> >
> > hi,
> >
> > this might be a tad premature, but....
> >
> > many folks have this need, and i was very disappointed with the most
> > popular offerings out there.
> >
> > a friend of mine has worked with me to develop a PIC-based rotary
> > which outputs a well-formed 20msec pulse suitable for Hagstrom (and
> > probably Epic, not tested yet)
> >
> > we use grayhill encoders, and the design accepts 12, 24, and 36 step
> > devices. it has an excellent "hand feel", and all the components are
> > mounted right behind the rotary, so there is no external card to
> > connect with. we have several prototypes, and are close to etching the
> > first batch of beta units. they are static protected,
> > reverse-connection protected, and have caps across the processor for
> > filtering. a nice, tight design.
> >
> > the "other" project (much more mature software-wise) is based on a
> > mechanical rotary switch. it's a 12-position switch which has an
> > internal stop which lets you make it assume any number of positions. i
> > needed this for throttles in a train simulator - one provides 8 steps
> > throttle,  another provides 9 steps brake. it only uses 2 hagstrom
> > lines: the processor makes the switch behave just like a rotary.
> >
> > i have since discovered it could be useful for many applications where
> > you do not want a knob to continuously spin. it has a "strong" force,
> > with an assuring "click" - much stronger than the rotaries. it has
> > been rock-solid in execution.
> >
> > at some point, i would like to work with a few "beta" testers for
> > their input. because it's processor-based, we can tailor the response.
> >
> > i'm curious about how many people might be interested in this tidbit,
> > and what they would want from an "ideal" encoder.
> >
> >  - adm -
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