Citrus Clock Loves Its Vitamin C

This is one clock that won’t suffer from scurvy anytime soon, as it gets all the vitamin C it needs (and more) thanks to the “batteries” powering it. The Citrus Clock, as you can guess, is a digital clock powered by citrus. All you need to do is cut a lemon in half and place each piece on both spikes of copper and zinc and you’re good to go. A single lemon is able to provide enough juice (pun intended) for up to a week (or maybe even two). No idea what you’ll do with other organisms who decide to nest in a rotting piece of lemon though…