Features: Hardware components: Arduino, relay module, jumper wires, and external power source Code: Arduino code for controlling the relay based on sensor input or a manual switch Applications: Home ...

We will Interface a switch for input from user. Control an 220V AC bulb with 5V relay. To control the relay we will use BC547 NPN transistor and the transistor will be controlled from the PIC16F877A.

This project demonstrates a smart relay system that can be controlled using the Blynk mobile app. The relay can be operated based on inputs from a proximity sensor (infrared sensor) and a clap (sound ...