Leaving out vital parts of a project when asking for help, because you've been studying the issue for so long its all obvious to you! Now that, to quote Dave, is a trap for young players. Be warned children!
Here is the critical missing info: sorry about that everyone!
The camera I am considering is a Moultrie M-100. Its a small camera designed for hunting, so on the plus side its:
- small
- weatherproof
- runs on 4/8 AA batteries with an excellent battery life (depending on settings - up to months)
- standard SD Cards with standard JPEG output
- time lapse functionality built in
- reasonable resolution
- 24 IR LED array for night vision
But as its primary function is for hunting, most functionality is triggered by the motion sensor, hence my issue here. There are other alternative cameras, for instance the Brinno TLC-200, which, again, is a small camera running on AA batteries with timelapse functionality, the downsides on this one is: the weatherproof box is not yet available, nor is the motion sensor, and the output of the camera is automatically saved as an 1280x1024 AVI file, whilst I can set the camera to 1 shot per second, and outputting at 1 FPS, meaning each frame is a single shot, Im still left with a 1280x1024 res image (as compared to the 8MP of the M100), which is likely suffering from compression artifacts from the AVI processing.
In a nutshell, then, the key requirements on the camera side, is
- long battery life, ideally the minimum battery life im striving for is minimum 1 month
- standard AA batteries for ease of field replacement
- constant time lapse and motion triggered
- a *decent* resolution
- weather proof
So all the suggestions so far, have been brilliant (and im still kicking myself that i didnt think of a moving IR LED!) though, Im stuck on how to make it a practical solution. For instance, if I were to be photographing the forrest around my summer house, and interested in the changes in the surrounds over winter, I would need a constant time lapse, and a moving lamp in front on the camera that could trigger a PIR sensor, would likely consume far too much power, and it, unfortunately would attract passers by in an unattended camera, and likely scare wildlife away, and also has the downside of requiring to be weather proofed as well....
Im beginning to think the camera choice is wrong, but its the best compromise of features - i can wait for the weather proof housing and motion sensor for the TLC-200, but the output format is just too inflexible - I just saw adafruit had a weatherproof box with a clear front : perhaps an old canon powershot, CHDK and a massive box of AA batteries is the way!
Wow! now that I write all that out, there was a massive amount I left out of the original post that wasn't obvious! a thousand appologies all: future posters, learn from my mistake - post EVERYTHING!
cheers!