[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 ...

This file type includes high resolution graphics and schematics when applicable. Bluetooth technology and standards are opening the door for engineers to use portable smartphones and tablets to make ...

APS-C sensors are smaller than full-frame sensors, typically around 22.2 x 14.8mm for Canon, and approximately 23.6 x 15.6mm for other brands like Nikon, Sony, and Fujifilm. This size difference ...