This DIY gas leakage detector is designed for educational and basic monitoring purposes. For critical safety applications, ...

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!

Block Diagram. The security system comprises of an Arduino Uno microcontroller and a standard SIM900A based GSM/GPRS modem. ... The circuit is highly-flexible so that you can use any SIM900A modem ...