Motionactivated camera that sends pic via phone???
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Now it comes down to what is the simplest thing that can be done with
whatever is available. Analog used to be very consistent, and digital is
very inconsistent when it comes to DIY projects and parts.
It hasn't actually gotten any harder to transmit images though, starting
from scratch.
Primitive FAX machines were invented to transmit images even before
simple telephones existed in the 1800s. Surely something could be
rigged up today to do the job with less effort even if, more or less, the
modern technology seems too specific-purposes oriented.
What I mean by that is , for example, analog security cameras can be more
easily used for unintended purposes than a cell phone with a built-in
camera, or a web-cam, where any new use must be an "app" or a "feature".
Specific answers:
Its possible to change the frame rate to match something, even if by
disassembling and re-assembling the camera and display and re-
designing them to match. Worthwhile? Sometimes maybe.
Which is better to invest in the result; Time to create it or Money to buy it?
(Many recent camera and display parts are almost microscopic and nearly
impossible to assemble by hand.)
Remote control can be very generic, so its not much of a problem.
A laser pointer or LED can provide surprise transmit range in line of sight,
but not very well for ordinary video. Occasional snapshots can be sent
efficiently at a slower rate than video, like FAX in a worst case situation.
Most legal radio modules have much less range than light beams.
Blinking colored lights are common and have been for a hundred years,
so they are not much of a problem.
http://www.supercircuits.com/index.asp?PageAction=VIEWPROD&ProdID=5494
http://www.geeks.com/details.asp?invtid=DIGI-MOTION-DETECT
These products might give you some ideas.
Both require an external camera, but they are cheap. If you added a wireless transmitter, you could hide the recorder in a different spot than the camera.
a bigger issue might be how to power them for extended periods.
Any remote camera will require periodic servicing.
I'm not sure that transmission via cell phone is ideal. depends on what you're actually trying to do, I guess.
You could consider a webcam/wireless option too, if remote monitoring is your goal.
I just wish the digital camera manufacturers would add motion detectors to a point and shoot, so captures could be higher resolution than these "security cameras" offer.
Pekar
http://www.jesseshunting.com/site/homebrew-cams.html
http://www.fieldpix.com/
You said you did surveillance.
This is famous from a few years ago:
X-10 Cam
It can be cheaper and better because the digital is Flattening
the analog market. Soon they'll be throwing away the analog video stuff!
Tiny cameras are easily $25-$50. Look here:
CCTV Marlin P Jones
Tiny UHFTV transmitters, don't know the best price,
although an electronics store had a clearance for $25 last year.
I think VCR's are that cheap too, but also found in the trash.
TV's are that cheap, and in the trash.
If trac phones with cameras are this cheap with service,
go ahead and hack them to do this.
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