RE: Digital camera in scale models!
Oop's forgot to mention. We just use micro servos in many cases to activate the shutter. Scale builders can do excellent work with little functions. Lots of guys use hot glue or velcro or something to attach the servo. Although this does seem to work I shudder at the thought and build little mounts and levers to activate my shutter.
Many if not all little digital camera's shut down if they aren't activated for a few minutes. There are means to prevent that shut down from occuring. Let me know if you get to that point. We'll go look at a very slick device from Mr.RC-cam.
Dan