hey, i want to make a quick experiment and i need a view tipps to start. the idea is to place a photoresistor on the outside of a package and send it to someone by mail. in the inside of the box there is a arduino board with an sd card, which logs the values from the photoresistor every 5 seconds…

photoresistor + sd card + battery + arduino

system October 22, 2010, 8:41pm 6

My Canon powershot camera runs on 2 AA batteries and shoots hundreds of multimegapixel shots on 1 pair

I wish my A540 did
I barely get a decent single tank dive out of a set of batteries.

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