Diy Timer Boards for Archery [WIP]

This post will follow the development and build of a set of boards used in Archery for keeping time of an end, displaying the current detail shooting and signalling when it is safe to shoot and when it’s safe to collect your arrows. As many other projects, this one is built around some Arduinos, some LED strips and some radio communication modules. Requirements: Count down the time from a set number of seconds down to 0.