Project Idea
This home automation solution enables hands-free control of four basic home appliances—light, fan, heater, and AC—using voice commands relayed from an Android app over Bluetooth. Especially useful for elderly or physically challenged users, it easily retrofits with standard home wiring, letting anyone operate household loads without physical switches.
Project Description
A Bluetooth-connected 8051 microcontroller receives voice commands from an Android device via its integrated module. Upon receiving a command, it activates or deactivates individual home appliances using relays and a relay driver IC, with system status shown on an LCD. The project demonstrates robust, individual or group load control through intuitive voice input.Total List of Components
AT89S52 (8051 microcontroller)
HC-05 Bluetooth module
16x2 LCD display
Crystal Oscillator (11.0592 MHz)
4-channel relay module
Relay Driver IC (ULN2003A)
Resistors
Capacitors
Transistors
Cables and connectors
PCB and breadboard
LEDs
Diodes (1N4007)
Push buttons
Switches
IC sockets
Lamps (bulbs)
Transformer/Adapter
Bridge rectifier
7805 voltage regulator
Android app (free)
Features
Voice command-based ON/OFF control for 4 appliances
Bluetooth connectivity for wireless operations
Individual and simultaneous switching of loads
LCD status display of system operation
Supports Android devices with GUI-based app
Built-in surge-protected power supply
Easy retrofitting for home or office
Reliable relay isolation and control
Applications
Smart home solutions for seniors/disabled
Hospital rooms for patient comfort
Office automation (meeting rooms, utility areas)
Industrial load and process control
School/college lab learning and demonstrations
Project Includes:
Project components
Circuit diagram / circuit connections
Source code
Instructions document
Project Types:
- DIY KIT (Do It Yourself KIT) - Along with the components, you will get the source code, circuit diagram/circuit connections, and instructions document to help you build the project easily.
- Ready-Made - We are providing a fully assembled, tested and ready-made project soldered on a PCB with all the other components, code & circuit diagram.
Dimensions
PCB/Unit: 16cm x 12cm x 4cm (standard assembly sizing)
Shipping Dimensions
Boxed: 28cm x 24cm x 8cm (carton suitable for national courier)
Weight
Assembled unit: 0.45kg (main board + all components)
Estimate Project Weight
Total shipment (with packing): 2kg
Notes: All the products are made by LearnElectronics India and not for re-sale.
