One advantage of using Arduino as a security system is the flexibility ... The best sensor you can use to detect an intrusion is the Passive Infrared (PIR) Sensor. The PIR Sensor detects the motion of ...

Following is the Arduino Sketch, tailored for Digispark Attiny85 Development board! /* * Grove-mini PIR Motion Sensor Module (v1.0) * Quick Test Sketch / Digispark Attiny85 Dev. Board * Author: ...

This voltage can be read by an Arduino digital input and then the Arduino can act upon it. The PIR Motion Sensor on the left is made by Parallax and sold by Radio Shack. The one on the right comes ...

[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 ...

When everything’s plugged in, this is how your Arduino, motion sensor ... as “3”—these correspond to where you plugged the PIR sensor and power relay into the Arduino.