EDN

Security Light & Switch with PIR Sensor

Moderately priced Passive Infrared PIR Sensor modules are now widely available. By using these readymade and pre-configured PIR sensors, even an average electronics hobbyist can construct his/her own ...
The Verge

Here’s the tech that could turn millions of Zigbee light bulbs into motion sensors with a single update

Sensify is a new technology that can turn Zigbee switches, bulbs, and plugs into sensors with a firmware update. This could be how Philips Hue will bring ambient sensing to its smart lights. Sensify ...
EDN

Security Light & Switch with PIR Sensor Update

This is a simple update to Mr. Hareendran’s PIR Sensor Security Light circuit. It has a shortcoming limits the relay voltage to approximately 3.3V. While this may function with some 5V relays, it will ...