The presented schematic shows how to build a simple PIR motion sensor. PIR sensors allow motion sensing, it is almost always used to detect whether someone has moved in or out of the sensors range.

The project develops a USB powered IR sensor by using an ATtiny13A, an IR motion sensor, and a metal candy Mario Bros mushroom tin. The project develops a USB powered IR sensor by using an ATtiny13A, ...

Home automation with high usefulness and low annoyance tends to rely on reliable person sensing, and [francescopace]’s ESPectre shows one way to do that cheaply and easily by leveraging hardware ...