The holiday season brings two questions: "Isn't it time to put up the Christmas lights?" and "When do we take down the Christmas lights?" Edward Nauman designed retractable icicle lights that go up or down with a flick of a switch. He used rotating lengths of metal conduit to wrap up lights and keep them out of sight behind a facia board. Ed's invention brought peace to his holiday season. The design involves a bracket, a motor, micro-switches, conduit and a few other odds and ends, plus some metalworking experience.
In a line of ultra-futuristic projects, DARPA is developing a brain microchip that will help heal the bodies and minds of soldiers. A final product is far off, but preliminary chips are already being tested.
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