created basic program on ATmega with an ISR
cleaned up code for basic interrupt program
added sleep/wake functionality
interrupt is on falling edge, internal pull up still does not appear to be working, and interrupt pin appears to  be floating but interrupt is working well.
interrupt working with trailmaster
sending output to trigger relay on interrupt.
powers relay until input signal. currently the interrupts that occur while powering relay hold off until signal to turn off relay.
added a few more power saving features. not positive they are working.
adjusted I/O pins for continuity with PCB
complete functionality of atmega_328p. could use some basic code cleanup but it works.
modified script slightly to account for 0 sensors
main cpp file for stacked IR sensors.
Merge branch 'ATmega_testing' of https://github.com/UCSD-E4E/intelligent_camera_trap into ATmega_testing
merging avr code to master branch
Merge branch 'ATmega_testing'