Ed Nauman owns a house situated just
uphill from some city-owned property that provides his yard with an endless
supply of pocket gophers. He has tried to defeat them from digging up his
yard, but without much success until he tried a siren with several annoying
tones. A simple timing circuit drives the siren with a low duty cycle. As Bill
Murray said in Caddyshack, "In
the immortal words of Jean Paul Sartre, 'Au revoir, gopher.'"
Halloween isn’t just a time for creative costumes. Thanks to the element14 online design community, the holiday this year also brings us a number of creative electronic device design ideas aimed at making your Halloween party a unique experience.
On April 15, 2010, President Barack Obama gave a major speech at the Kennedy Space Center in Florida, announcing that the US would send astronauts to Mars by the mid-2030s. But in order to do so, NASA would first need to ramp up its capabilities through missions directed toward "a series of increasingly demanding targets," i.e. asteroids.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.