There’s a huge market for 433 MHz alarm system hardware out there, from PIR motion detectors to door and window sensors ... and some code. In his latest video, [Aaron Christophel] shows how ...

You can connect any intrusion detection unit (such as a light fence or a motion sensor) to the input connector J2. Note that an active-low (L) at pin 1 of connector J2 triggers the security system ...

Not wanting to pay a monthly fee to have it setup, he decided to try interfacing an Arduino with the system in order to push ... the alarm system is armed, disarmed, or triggered. All the code ...

Here is an ultra simple Arduino Night Alarm ... our system requires a “Logic High (H)” level input to wake up. The best sensor you can use to detect an intrusion is the Passive Infrared (PIR) Sensor.