Here is an ultra simple Arduino Night Alarm project wired around ... level input to wake up. The best sensor you can use to detect an intrusion is the Passive Infrared (PIR) Sensor. The PIR Sensor ...

Using motion detectors and an Arduino you can trigger lights ... Check to see if the sensor is triggered; if it is, flash the on-board LED in front of digital pin 13. This is a good way to ...

If you want to keep an eye on your home—whether you're worried about burglars or just worried about the dog getting into places it shouldn't—this super simple DIY alarm will send you an SMS ...

[Micamelnyk] decided to build a solution to this problem in the form of a motion sensing ... stationary. The LED will turn off after 20 seconds, indicating that the alarm is now armed.

Let it hit your red LED and you’ve lost ... Inside the cool laser-cut box is an Arduino Uno and a 9V battery, plus a current-limiting resistor and the all-important buzzer.