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!

DIY ESP32 Alarm System Leverages 433 MHz Sensors. April 2, 2020 by Tom Nardi 14 Comments ... He’s using an Arduino Uno and an Ethernet breakout board to hook it up to the network.

However, if you’re just looking to catch a sandwich thief at work or a cat spilling over all you water bottles, then Make shows you how to build an alarm system with an Arduino and a USB camera.

Using motion detectors and an Arduino you can trigger lights, ... PIR Pin “Alarm” connects to Arduino Digital 2. ... Of course you can use multiple sensors and outputs to trigger different ...

This build is about using the temperature sensor in your clock. The ATMega328p, the chip at the heart of all your Arduino Uno clones, has within it a watchdog timer that clicks over at a rate of ...

This articles describes how you can use I2C (TWI) communication, Arduino and temperature sensors to measure 3 different temperatures. It can be very helpful when you want to measure the outside, ...