Adafruit has this week announce the arrival of a new product in the form of the Adafruit VCNL4040 Proximity and Lux Sensor – STEMMA QT, which is now available to purchase at an affordable $5.95. The ...

Let me introduce another simple microcontroller-based do-it-yourself circuit that detects motion and excites a light source in a flash. The “snooper” here is an ordinary passive infrared (PIR) motion ...