Graham Warrellow wrote:

> >>Bill and others have made some great wish-lists for the LX???, I
> >>wondered if it might be feasible to have a plug-in infrared remote
> >>control (plugged into the keypad port?). This would be great for
> remote
> >>focusing, motion control, etc. from my bedroom window without yet
> >>another cable :)
> >
> >Whoa, that's a good and simple idea! I don't have my basement
> workshop
> >really set up yet, but I might push it for that one. On the scope
> end, a
> >simple circuit with an LED driver and reciever powered by the scope
> should
> >suffice. On the keypad end, a battery and a matching TX/RX circuit
> should
> >do it. No intelligence needed, and you get to use your existing
> keypad.
> >Hmmmmm...... I'd bet that all necessary stuff is off the shelf at
> Radio Shack.
> >
>
> Paul/Bill,
>
> I was hoping an infrared control might be a feasible product for the
> LX200. Is this yet another spin-off opportunity for some enterprising
>
> individual? Anyone have any ideas over what sort of distance
> something
> like this could operate?
>
> What really made me think of this was that there are only two other
> alternatives for distance remote slewing/focusing; the recent
> discussion
> on extending the LX200 keypad (I am still unclear what the final view
> on
> this is) or the use of a RS232 PC-LX200 link.
>
> Well Paul, if you ever get this gizmo off the ground let us know :)
>
> Good luck,
> Graham

For a fair summary of the keypad issue see my summary discussion on
my web site at: <http://www.mailbag.com/users/ragreiner/>

The signals are described in some detail at the site. They are,
briefly, 5 volt pulses as a rate of about 10KHz. There is a keypad to
computer channel and one the other direction. It should be easy to
build a send and receive interface for these very simple signals. I
simply do not have the time right now but see no design problems
whatever. Somebody out there just do it. ;-)

Doc G

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