An overdrive pedal this tiny is a bit ridiculous. Turns out, making it small also makes it pretty awesome.” Roughly the size ...

It’s a project called snapVCC, and it turns a 9 volt battery into a regulated 3.3 or 5 volt supply. The idea behind snapVCC is simple enough; just add a circuit board to the top of a nine volt ...

A headset worn at home that zaps the brain with the energy of a 9-volt battery could help relieve symptoms of depression, a new study shows. The study, which was published last week in the journal ...

The whole circuit is built on top of a battery clip so it can be run straight from the top of a standard 9 volt battery. It’s a circuit you’ll find all over the place, even built into many ...