The PIR Motion Sensor on the left is made by Parallax and sold by Radio Shack. ... Here is the Arduino code for the Parallax sensor. ... flash the on-board LED in front of digital pin 13.

Even though Attiny85 is fitting here, I opted for Digispark just because of its plethora of features like USB programming interface, on-board voltage regulator, and Arduino IDE compatibility. The code ...

when it detects a moving target. Most Digital PIR sensor modules have three connector pins: Vcc (5V), Ground (0V), and Output. The output is a digital LOW or HIGH, depending on whether the sensor has ...