[ladyada] has a freshly-published and amazingly thorough tutorial on passive infrared (PIR) motion sensors. Most often seen in security floodlights and automatic doors, in creative hands these sensors ...

Adafruit just posted an awesome tutorial on reading analog sensors with the Raspberry Pi. It’s a great walkthrough that can be applied to your next Raspi project as well as any project where you just ...

One of the things that make a smartphone smart is its ability to detect movement, orientation and aspects of its environment (temperature or humidity). One of the things that make a smartphone smart ...