Gadget Freak Case #197: Controlling Solar Water Flow
Gadget Freak 10/25/2011 19 comments To make his solar water heater more efficient, Paul Westaway put together a differential controller that turns on the pump when the temperature of the solar panel or woodstove coils is higher than the temperature in the storage tanks and turns off when the temperature is lower.
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.