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Debugging a Three Way Switch

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We had a number of three way switches in our house that didn't work when we moved in. In fact, not one worked right. Whomever wired the house back in 1986 either didn't care or didn't know how to hook them up correctly. If you're not an electrician, or are not familiar with their standardized technical terms, the troubleshooting guides available might be confusing or useless. The information that comes with the switches seems to be the same. After pondering this issue for a few minutes the answer presented itself. 1. The "common" wire is either the load (to the light) or the hot wire (from the breaker box). 2. A "traveler" wire is just a wire that only connects to the switch. It doesn't lead to the load or the breaker box. To identify the "common" wires, the simplest method is to disconnect the switches and use a voltage detector pen (such as a Fluke VoltAlert Non-Contact Voltage Tester ) to find the hot wire. Once the hot wire ...
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Zen's World: A Hard Science Fiction Series by John Coryat

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Welcome to Zen's World: A Universe of Hard Science and Human Flaws For as long as we have looked to the stars, we have asked the same question: Are we alone? Science fiction has long been fascinated with this idea, painting pictures of first contact that range from utopian encounters to terrifying invasions. But the Zen's World series starts with a more grounded, and perhaps more cynical, question: If we finally got a message from the void, could we, as a species, even handle it? What happens when a discovery of unimaginable value is dropped into a world of corporate cold wars, military paranoia, and deep-seated human flaws? This is the central question at the heart of Zen's World , a narrative-driven science fiction series that blends the meticulous detail of hard sci-fi with the high-stakes tension of a political thriller. It’s a universe built not just on advanced technology, but on the uncomfortable and often brutal realities of human nature. A Future Forged in Rivalry...
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Zip Code Boundary Maps

In 2005, I wrote one of my first custom mapping projects using the recently released Google Maps API. It was a fairly crude map that used the Census Tiger ZCTA' s (Zip Code Tabulation Area) to display a representation of a Zip Code area. Matt Cutts, at the time, a major player at Google in search, wrote a blog post called "Fun with Zip Codes"  that caused my site to get an average of 70,000 unique visitors a day for about a week. The traffic that Matt's blog post caused made me consider that there could be a market for this type of site so I looked deeper into the issue and learned a number of interesting things. The most important thing I learned was that Zip Codes are not areas. They are delivery routes. The USPS draws these delivery routes based on the efficient delivery of mail and nothing else. They can cross city, county and even state lines if it means the mail gets delivered efficiently. Not every address in the US has a Zip Code. This is not obvious for...
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