RE: [APML] A Robotic Film Camera, first prototype

["Chris Schur" <cschur@therim.com>]

George, that's easy, I'm telling the camera the number of exposures in the
roll, so it only takes that many or less say if twilight starts.  Its easy
with a microprocessor.

What will be more interesting is how the load will vary with temperature.  I
may have to sense this as well, and adjust the current limit to suit
real-time.


Clear Skies,

Chris Schur
Astro: http://www.PSIAZ.com/Schur/astro

-----Original Message-----
From: astro-photo-bounces@seds.org
[mailto:astro-photo-bounces@seds.org]On Behalf Of George Anderson
Sent: Saturday, December 20, 2003 9:11 PM
To: Discussion of Film Astrophotography
Subject: Re: [APML] A Robotic Film Camera, first prototype


Hi Chris

Dumb question time. You have current limiting on the wind servo to
prevent the arm from being ripped off, is the current limiting sensitive
enough to detect jammed film or the end of a roll so that film damage
does not happen?

George Anderson
Montreal Canada

Clear skies and good health

Chris Schur wrote:
>
> Hi All,
>
> Here is a project that has been consuming me for a few weeks, the
prototype
> for a fully robotic microcontroller controlled film camera for routinely
> shooting the night sky for hours on end, with no human intervention.  At
> this point, the mechanical assembly is done, and I have many hours in
front
> of me building the electronics control panel and programming the micro,
but
> I think you'll agree, its going to be awesome when done. Here is what I
have
> so far, try not to laugh too much!  Click on the thumbnail for a series of
> detailed images...
>
> http://www.psiaz.com/schur/astro/latest47.html
>
> Comments appreciated!
>
> Chris
> Astro: http://www.PSIAZ.com/Schur/astro
> Paleo: http://www.PSIAZ.com/Schur/azpaleo/azgeology.html
> Photography: http://www.PSIAZ.com/Schur/azpaleo/paleo.html
>
> _______________________________________________
> Astro-Photo mailing list
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