The Voice Controlled Home Automation System is designed to provide a smart, convenient, and efficient method for controlling household electrical appliances using voice commands from an Android mobile device. The system utilizes a PIC microcontroller as the central processing unit, which receives voice-based instructions through a Bluetooth communication module. These decoded commands are then processed by the microcontroller to operate various home appliances such as lights, fans, or other electrical loads through relay driver circuits and relays. A regulated power supply ensures stable operation of all components, while a crystal oscillator provides accurate clock signals for the controller. An LCD display with an LCD driver is used to show the status of the connected devices in real time, and an LED indicator provides visual confirmation of command execution. This system offers hands-free operation, improved accessibility for elderly or disabled individuals, enhanced user convenience, and increased automation in smart homes. The proposed design is low-cost, easy to implement, and adaptable for expansion, making it a practical solution for modern home automation applications.    

Features:  

 Voice control – You can turn appliances ON/OFF using your voice.

 Bluetooth communication – Mobile phone sends commands wirelessly.

 PIC microcontroller – Controls all the devices.

 Relay switching – Safely turns home appliances ON/OFF.

 LCD display – Shows the status of each device.

 LED indicator – Glows when a command is received.

 Regulated power supply – Gives stable power to the system.

 Reset button – Restarts the system when needed.

 Accurate timing – Crystal oscillator helps the controller work properly.

 Easy to use – Simple, fast, and user-friendly system.  

The major building blocks of this project are:  

1. Regulated Power Supply.
2. PIC Microcontroller.
3. Relays.
4. TWO AC bulbs.
5. LED indicators.
6. Reset button.
7. Bluetooth modem.
8. Crystal
9. LCD display.

    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:

   

video: