The relay's primary appeal is its ability to do a lesser-switch's bidding but it's capable of so much more. Relays can be wired together to create very useful, simple, and utterly reliable networks.

Ready-made wiring harness and relay kit makes it easy to add a horn relay to power a set of motorcycle horns. Uses high-quality components. Adding a relay can improve the horn’s output and reduce load ...

An RC circuit in series with the coil allows full-current turn-on for reliable relay operation, then reduces the current to save power. Fellow engineer Sanjay R. Chendvankar of Mumbai, India, recently ...