A lamp for $5 that does not require any electrical power source? It may sound like an impossible dream, but two designers in London have built functioning prototypes of GravityLight, a cheap way for ...

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Stockholm-based American designer Simon Morris has combined science with a stroke of design wizardry to create a surreal, gravity-defying light bulb. Currently raising funds on Kickstarter, Morris has ...

Here’s a fun entry into our coin cell challenge. The power source is the actuating force in [Frank]’s blinky LED Christmas tree, which takes advantage of the physical structure of coin cells and our ...