Source code modified by Scott Allen to add battery voltage monitoring.
A description of the hardware design intended to use this software can be found at
http://www.mlxxxp.ca/electronics/intervalometer/
Based on the LRTimelapse Timer Pro Free by Gunther Wegner, http://gwegner.de http://lrtimelapse.com
Project Infos on: English: https://lrtimelapse.com/lrtimelapse-pro-timer-free/
German: http://gwegner.de/know-how/lrtimelapse-pro-timer-free/