I'd like the uC to sleep for 1s. Most of the time, it would wake up, briefly check if there are inputs, sleep again.
I suppose, I could make this circuit, if nothing else.
But in truth, cyclic sleep is my plan B. I'm doing a little survey of what Arduino/ATmega can do in the sleep department. (Myself, I'm a PIC and MSP430 guy most of the time.)
Plan A is to wake up the controller through Anaren radio and external interrupt.