An electrical relay is a type of remote-control switch able to handle high-current accessories. Marlan Davis explains a 12-volt relay and how it works.

Testing relays and their circuits in vehicles doesn’t always require a trip to the bench. With a few simple tools and ...

In essence a relay is an electro-magnetic switch which uses a small current – the “control current” – to close a circuit in which a much bigger current can then flow. At the heart of a ...

This low current relay circuit is designed to be used in battery operated electronic devices. Its operating current is in micro amperes (µA). This is done by using a bistable relay and adding some ...