Deep in the Colorado foothills, there are two radio transmitters that control the time on millions of clocks all across North America. It’s WWVB, the NIST time signal radio station that sends the time from several atomic clocks over the airwaves to radio controlled clocks across the continent. You might think replicating a 70 kW, multi-million dollar radio transmitter to set your own clock might be out of reach, but with a single ATtiny45, just about everything is possible.
Even though WWVB has enough power to set clocks in LA, New York, and the far reaches of Canada, even … Read the rest
from Hack a Day http://ift.tt/1gmBvYg
via IFTTT
