Cables in the ground or held up by pylons join wind farms and power stations to our homes and schools in huge electrical circuits. Inside a building, more circuits are hidden inside walls ...

Transcutaneous electrical nerve stimulation (TENS) is a technique that applies electrical current to nerves and muscles for the relief of pain. Before you ask, yes, some of these devices are FDA ...

The build relies on a very simple circuit that relies entirely on analog electronics in lieu of the usual digital signal analysis usually employed for the job. It’s a barebones design that’s ...