SIM900-Arduino-Relay-Control This project uses GSM Module (SIM900) with Arduino to switch Relay state by SMS OR CALL.

One of the most useful things you can do with an Arduino is control higher voltage (120-240V) devices like pumps, fans, lights, heaters etc. Since the Arduino operates at 5V it can’t control these ...

Swift Automatic Transfer Switch based on Arduino Mega 2560,Triacs Bluetooth and GSM Abstract: A ceaseless supply of electricity is essential for all developmental sectors and even more important ...

This GSM security switch project is based on Arduino Nano and SIM800L.The alert system is configured to send an SMS in response to a security switch action.

When notes stuck to the water heater failed [Ryan] decided to whip up “the world’s most expensive 240V relay” using a servo, a real time clock and of course an Arduino. All in an attempt to ...