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Re: Controlling a Sound Devices recorder automatically

Subject: Re: Controlling a Sound Devices recorder automatically
From: "ozrall" ozrall
Date: Mon Apr 7, 2008 3:28 pm ((PDT))
Rob,

Thanks for that tip.
That would certainly do the trick for me.
I'll try it tonight.

My aim is to have some recorders situated in semiremote areas in the
field automatically start and stop at the same times starting before
dawn and periodically thereafter for shorter sampling periods and
again prior to dusk.
The critters I want to record are mobile and may not necessarily fly
in to the area that I setup at, by recording at some selected key
sites I am virtually guaranteed of recording something.

At another site my subject circles the little lake/pond first - if
there is anything it doesn't like, it continues on its way.

My presence disturbs the normal bird/wildlife activity when I tramp
in, so I would like to try it without my disturbances and see if it
works any better.
Plus the advantage of not having to get up at 4.30am to get setup on a
working day is a more attractive option !

With 16gb CF cards I can obtain many hours of unattended recording at
prime times. By systematically recording at times known to be good for
recording and then sampling at intervals for shorter periods of time,
I can identify what else is going on there and thereby optimise my
recording times. 

That is theory (yet to be proved) anyway !

Your solution is possibly much better because of the battery life
issues (although I already bought some big batteries to handle 24-48hr
periods - its also easier to construct and code a micro that does this.

Thanks

Rally

PS - If anyone has the PDF file I would like a copy if possible.
I sent a message to Sound Devices so hopefully they can accommodate my
request.


> 
> 
> I'm not clear what folks' goals are, but for starting/stopping the 
> recorder at programmed times, there's a setting in the 722/744T menu 
> that will instruct the recorder to start recording every time you 
> supply power at the external power jack and to stop recording every 
> time you cease power at the external power jack.  Seems like it might 
> only take something like a Programmable Thermostat Timer and a relay 
> rated at 2 amps or so.  I've not tested it thoroughly, but the power 
> on/off approach could save on battery requirements too.  Rob D.
> -- 
> 
> 
> 





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