RO&AD, an architectural firm whose name sounds very much like a quote from an intoxicated Chris Farley, recently designed The Trench Bridge. A pedestrian foot path designed to make us rethink the way we look at bridges, this one crosses the moat in front of Fort de Roovere in Halsteren. A neat concept, but one that would only be applicable on a small scale to bodies of water that stay at a constant depth.
Instructables user hanlin_y did the math and realized that alkaline batteries are one of the most expensive forms of power that consumers can use. So he/she/it came up with a solution to power your parts even if they don't come with an AC adapter. With a wall plug, wires, and bamboo strips you can run your electronics off the grid; saving money and the environment at the same time.