HVS-1450. Voice Controlled Home / Industrial device monitoring & controlling using Android Bluetooth.

hvsadmin — Sat, 29 Nov 2025 11:57:42 +0000

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:

Regulated Power Supply.
PIC Microcontroller.
Relays.
TWO AC bulbs.
LED indicators.
Reset button.
Bluetooth modem.
Crystal
LCD display.

Software’s used:

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

Regulated Power Supply:

Block diagram:

video:

HVS-1686. Home Automation Using IOT.

hvsadmin — Sat, 22 Nov 2025 09:01:32 +0000

The project aims in designing a system which makes operating of electrical appliances in home through Android mobile phone using IOT. The controlling of electrical appliances is done wirelessly through Android smart phone using the Wi-Fi feature present in it. Here in this project the Android smart phone is used as a remote control for operating the electrical appliances.

Wi-Fi (Short for Wireless Fidelity) is a wireless technology that uses radio frequency to transmit data through the air. Wi-Fi has initial speeds of 1mbps to 2mbps. Wi-Fi transmits data in the frequency band of 2.4 GHz. It implements the concept of frequency division multiplexing technology. Range of Wi-Fi technology is 40-300 feet.

The controlling device of the whole system is a Microcontroller. Wi-Fi module and Relay, Transistor are interfaced to the Microcontroller. The data received by the Wi-Fi module from Android smart phone is fed as input to the controller. The controller acts accordingly on the Relay, transistor to switch connected electrical appliances. In achieving the task the controller is loaded with a program written using Embedded ‘C’ language.

The main objectives of the project are:

Controlling of AC devices wirelessly through mobile phone.
Usage of Android touch screen smart phone to performing the task.

The major building blocks of the project are:

Regulated Power Supply.
Microcontroller.
Wi-Fi module
Relay with driver.
Crystal oscillator.
Reset.
LED indicators.