One of the ADCs measures the voltage level ... battery is low and you should shut the device down either manually or programatically. The battery leval at which the signal is triggered can be adjusted ...

So, what do you do when your Arduino project needs to operate in a remote area or as a portable device? There are LiPo battery shields available, and although they may work well, recharging ...

This is a work in progress. More content in this Readme, especially about calibration Ability to measure cameras like Barnack Leicas where you cannot access the rear of the shutter curtain. Finish ...