Adding a sensor to the Ring Alarm system is easy when you know how, but you should consider if it's really worth it.

A leak sensor is a quick and affordable way to identify potentially damaging water leaks.

While PIR sensors can be used with Arduino and other microcontroller boards, those best-suited for hobby use are smart enough to perform simple tasks without any programming.

Ultra simple circuit of the tilt sensor alarm presented here can be fabricated using readily available inexpensive components. The circuit is a true transistor based design. Home made Tilt sensor for ...