Code for the WWVB Clock in Popular Science's April 2010 issue. http://www.popsci.com/diy/article/2010-03/build-clock-uses-atomic-timekeeping wwvb_clock.pde: This is the main WWVB clock code. wwvb_signal_simulator.pde: This simulates the WWVB signal for development and testing and provides a test harness for WWVB receiving clock development. This project implements a WWVB receiver using an Arduino, a C-Max WWVB receiver module, and a Maxim DS 1307 Real Time Clock module. It is, at present, less fully developed than it could concievably be. It lacks support for things like time zones, and special, exciting messages to announce upcoming Leap Seconds. And that, coders, is where you come in. Furthermore, the project was concieved as a basis for hacking on WWVB time code signal reception. So, get to hacking. Copyright (c) 2010 Vin Marshall (vlm@2552.com, www.2552.com) Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.