The Mobile Phone Controlled Street Light Control System with Automatic Day/Night Switchover is a smart lighting project that provides both manual and automatic modes of operation. The system is built around a PIC microcontroller, which controls high-power LED street lights based on commands received from an Android mobile application and the surrounding light conditions. The Android phone communicates with the controller through an HC-05 Bluetooth module, allowing the user to switch the street lights ON or OFF and select the desired operating mode wirelessly. In Manual Mode, the user controls the street light directly from the Android mobile application using Bluetooth. The user can turn the street light ON or OFF at any time and select the operating mode without physically accessing the lighting system. This mode is useful for maintenance, testing, and special situations where manual control is required. In Automatic Mode, an LDR (Light Dependent Resistor) continuously senses the ambient light intensity. During daytime, the controller automatically switches the street light OFF to save energy, while at night it turns the light ON without human intervention. The mode selection between Manual and Automatic is performed through the Android mobile application, making the system user-friendly, energy-efficient, and suitable for modern smart street lighting applications.        

The main objectives of the project are:  

1. Controlling of street lights through mobile phone.
2. Intelligent switching of street lights based on LDR.

          The main building blocks of the project are:  

1. Regulated Power Supply.
2. PIC Microcontroller.
3. Bluetooth.
4. LDR
5. High power LED street light
6. Reset.
7. Crystal oscillator.
8. LED indicators.

        Software’s used:  

1. PIC-C compiler for Embedded C programming.
2. PIC kit 2 programmer for dumping code into Micro controller.
3.  Express SCH for Circuit design.

            Regulated Power Supply:

                   

Block Diagram:        

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