This is a project to create a long-lifespan solar powered device that blinks a morse code message. All of the CAD, code and PCB design is open source, and created with open source tools.
CAD: https://www.freecadweb.org/
Code: Python and C.
Build journal/docs: https://wiki.tjhowse.com/doku.php?id=projects:blinker:overview