Thanks so much for your reply. I was hoping to set this up and not have to worry about starting it each morning, but only worry about downloading periodically. Sounds like I need to rethink this. The camera is mounted in my home so guess I'll just have to set the reminder alarm clock for a power up each morning and power down each evening.
Should be easy enough to have the camera shut itself off automatically after dark so you'd only have to remember to power it up in the morning.
Do you think that running it as I describe for a week while away would be a concern if I am usually powering down each evening?
My guess is that a week would be fine but its just a guess. I seem to recall at least one forum conversation from somebody who tried this and who got extended periods of successful operation with occasional apparently random shutdowns. I'll look for the thread - IIRC there was an actual calculation of sun rise & sun set - although you could simple check brightness levels and start / stop shooting based on that.
You might even set this up and just let it run to see how well it works. Worst case, you can reset it every weekend as you downloaded the weeks shots. At this point, its a "try it and see" I guess.
Update : forum searching seems to get harder every year as the volume grows but I managed to find this :
15 Month Construction Time Lapse?and it seems somebody made a wiki page of the referenced script and posted it here :
Selective IntervalometerAlso, I found an old post where
reyalp pointed out that some of the old CHDK cameras would power up when a signal is applied to the USB port. If you are interested in that approach you can probably find one on eBay. I'm pretty sure
srsa_4c could tell you which ones.