A DIY light switch controller by Bluetooth (2 Channel) is an exciting electronic invention that allows you to control lights or electrical devices wirelessly using your mobile phone. This project combines creativity and technology, giving you hands-on experience with Bluetooth communication, microcontroller programming, and smart home automation.
The main idea of this project is to design a system that can turn two lights (or other electrical loads) on and off using your smartphone. The project uses a Bluetooth module (such as HC-05 or HC-06), a microcontroller like Arduino or ESP32, and two relays to control each light channel. The Bluetooth module acts as a bridge between the mobile phone and the microcontroller, receiving commands wirelessly through a Bluetooth connection.
Once connected, a simple Android app or Bluetooth terminal can send commands like “ON1,” “OFF1,” “ON2,” or “OFF2.” The microcontroller interprets these commands and switches the relays accordingly, controlling the lights or any connected devices. The system can also include indicator LEDs to show the status of each channel.
This project is not only useful but also educational. It introduces concepts such as wireless communication, relay interfacing, and IoT-based control systems. Using Bluetooth ensures that the system works even without an internet connection, making it reliable for indoor applications like smart home lighting, fan control, or appliance automation.
To make the setup more advanced, you can add voice control or timer functions through mobile apps.
In conclusion, building a DIY Bluetooth 2-channel light switch controller is a perfect project for beginners interested in electronics and automation. It demonstrates how technology can make everyday life smarter, more convenient, and energy-efficient—right from your mobile phone.
