Here is an ultra simple Arduino Night Alarm project wired around a handful of inexpensive and easily available components. One advantage of using Arduino as a security system is the flexibility!

PIR sensor 18 Articles 2023 Halloween Hackfest: Quoth The Raven, “Caww!” October 31, 2023 by Kristina Panos 5 Comments ...

The code is an Arduino project for the Digispark Attiny85 to turn on a light source when the PIR sensor detects something. Note that after powering the PIR sensor module, it needs about 10 to 60 ...