The sensor outputs a signal between 0 and 5V which [Iron Jungle] reads using a PICAXE 18M2 microcontroller. Patching into that signal wasn’t hard at all. Once he found the correct wire he simply ...

A PICAXE microcontroller drives the clock, but for accuracy a DS1307 does the timekeeping. [Franspaco] etched his own circuit board that is sized to fit perfectly, housing the two chips ...