Voltage (V) is the ‘push’ which makes the electricity flow around a circuit. Circuits with lots of components need more voltage because they need more electrical energy pushed to them.

Your thoughts, emotions and behaviours arise from the complex network of electric activity in your brain. But what can we do when we need to tweak it?

It’s a pretty clever system with very simple and flexible circuitry. [0033mer] says he’s used this over twisted-pair wires a couple of hundred feet long, which is pretty impressive.

A simple body-integrated self-powered system (BISS) can convert mechanical motions of the human body into electrical energy by exploiting the triboelectric effect.