The reed switch was patented in 1941 by Walter B. Ellwood, a Bell Labs engineer. Ellwood was looking to design a cheap and easily replaceable relay unit for switching telecommunications traffic ...

If you’ve ever played with relays, you’ll probably be aware that a relay can be wired as a buzzer, and it’s this property that a vibrating reed inverter harnesses. He takes an octal relay ...

Camden Door Controls is pleased to bring to market a new CM-SRX2 wireless relay receiver with an ultra-compact weather resistant enclosure. This receiver offers high-security performance with rugged ...