I am currently building a system with the Arduino and a DS1307 timer. I was wondering if anyone had some advice about how one would go about using the ds1307 to wake-up the arduino after a certain period of time, run some operations, and then go back to sleep. The idea behind this move it so increase the battery life as much as possible. I have looked around quite a bit and have had little luck finding anything. I would love some advice or suggestions from anyone, especially someone who may have already come across this task.