Useless machines are a fun class of devices which typically turn themselves off once they are switched on, hence their name. Even though there’s no real point, they’re fun to build and to operate ...

Daisuke Uraji, the president of Day-Plaft Inc. with two trainees, show off their “useless” chili powder shaking machine. The Japan News TOKYO — “Three, two, one, dobatto!” With a push, a large amount ...

Slow day at the office? Here’s a trick that’ll make your coworkers smile. Dangerously Fun has a guide to build a homopolar motor from a battery, copper wire, and magnet. A homopolor motor doesn’t rely ...