Looking for ideas for a good geocache container that is powered by something like a raspberry pie

[G+_Michael Muni]

Looking for ideas for a good geocache container that is powered by something like a raspberry pie. Some sort of puzzle people would need to figure out to gain access in order to sign the log.

[G+_Black Merc]

Heavy duty case, Bluetooth ftp, math on outside to deduce Bluetooth link code..

[G+_Ben Reese]

What's powering the Pi? It would take a large battery to power the Pi for more than a few hours. Perhaps an Arduino for better battery life or at least to power on the Pi when it needs to interact with the visitor.

[G+_Ben Reese]

Kevin Darrah has a few videos on extremely low power consumption on an Arduino. Might be worth checking out for this.

[G+_Black Merc]

Mercury switch? Laying out face down... power off. Held up on corner... power on.

Make it part of the puzzle... (must stand on head to read:-P )

[G+_zyga zyga]

Make part if the puzzle use a hand crank Dynamo generator.

[G+_Black Merc]

zyga zyga a digital jack-in-the-box... really? Weatherproofing will be a pain.