[Arduino Practical Project #03] Making an Automatic Light with a Motion Sensor | Explaining How to Adjust the Turn-off Time

Let's use Arduino to make a light that turns on automatically only when someone approaches and turns off after a while.This ...
Hackaday

PIR sensor

Wireless sensor networks are nothing new to Hackaday, but [Felix]’s wireless PIR sensor node is something else entirely. Rarely do we see something so well put together that’s also so well designed ...