E&TC / ECE · Healthcare electronics · Final year project
TV Remote Controlled Home Appliances
A system to switch home appliances with an ordinary TV remote. The IR receiver decodes the remote's signals and the controller switches the matching appliance.
What is the TV Remote Controlled Home Appliances project?
A system to switch home appliances with an ordinary TV remote. The IR receiver decodes the remote's signals and the controller switches the matching appliance.
Key facts
- Type
- Final year project · Advanced
- Suitable for
- Diploma capstone and B.E / B.Tech final year
- Build time
- 6 to 8 weeks
- Estimated component cost
- ₹2,600 – ₹3,800
- Guidance from
- ₹9,999 (Hardware / IoT Final Year)
How the TV Remote Controlled Home Appliances works
- Voltage regulator / buck converter and 12 V power adapter / step-down transformer supply the circuit; a regulator gives the controller and sensors a steady 5 V.
- The Push buttons and switches provide manual inputs and the power switch.
- The 8051 microcontroller with board runs the embedded C program that scans inputs and controls the outputs through its four I/O ports.
- The IR receiver and remote receives commands from an infrared remote.
- The Relay module switches mains or high-current loads such as lamps, pumps and fans from a low-voltage signal.
- The Motor driver lets the low-current controller run the motors forward, reverse and at variable speed.
- The LEDs indicate status.
Block diagram
Inputs
Push buttons and switchesController
8051 microcontroller with boardCommunication
IR receiver and remoteOutputs
Relay moduleMotor driverLEDsComponents list and cost
Typical prices from Indian online stores and electronics markets (Lamington Road, Budhwar Peth, SP Road). Buy from one store where you can to save on shipping.
| Component | Qty | What it does | Approx. cost |
|---|---|---|---|
| 8051 (AT89S52) microcontroller with board | 1 | Runs the embedded C program that scans inputs and controls the outputs through its four I/O ports. | ₹300 |
| Push buttons and switches | 2 | Provide manual inputs and the power switch. | ₹80 |
| IR receiver (TSOP1738) and remote | 1 | Receives commands from an infrared remote. | ₹80 |
| Relay module | 1 | Switches mains or high-current loads such as lamps, pumps and fans from a low-voltage signal. | ₹70 |
| Motor driver (L298N) | 1 | Lets the low-current controller run the motors forward, reverse and at variable speed. | ₹180 |
| LEDs (assorted) | 1 | Indicate status. | ₹20 |
| Voltage regulator / buck converter | 1 | Provides a steady voltage to the controller and sensors. | ₹80 |
| 12 V power adapter / step-down transformer | 1 | Supplies stable low-voltage power from the mains. | ₹250 |
| T.V Remote | 1 | Part from the design specification | ₹150* |
| Lamps | 1 | Part from the design specification | ₹150* |
| Passive components, PCB and wiring kit | 1 | Crystal oscillator, resistors (assorted), capacitors (assorted), transistors / MOSFETs, cables, connectors and jumper wires, diodes, PCB / breadboard and ICs and IC sockets. | ₹445 |
| Wiring, PCB, soldering and enclosure | 1 | Project overhead | ₹450 |
| Demo model base / mounting board | 1 | Project overhead | ₹500 |
| Testing spares and replacements | 1 | Project overhead | ₹300 |
| Estimated total | Varies with brand, quality and city | ₹2,600 – ₹3,800 |
Prices are estimates for budgeting; items marked * depend on the exact size or model chosen. We confirm the bill of materials when your design is frozen, and components are charged at actual cost with bills.
How much does this project cost?
| Option | What you get | Cost |
|---|---|---|
| Components only | You buy the parts and build it yourself | ₹2,600 – ₹3,800 |
| Hardware / IoT Final Year | Working model or guided build, Circuit diagram and bill of materials, Firmware / code with explanation | from ₹9,999 + components |
| Capstone Project (CPE) | Working project or model, Black book in MSBTE format, Step-by-step explanation | ₹9,999 + components |
| Diploma ITR | 100% working source code, Project report PDF, PPT | ₹1,999 + components |
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Download the project brief (PDF)
Summary, working, components and cost and viva questions on one branded PDF to show your guide or team. To get it developed, contact us on WhatsApp.
What you submit with this project
- Working model with circuit diagram and program code
- Project report or black book in your university's chapter order (block diagram, circuit, calculations, results)
- Presentation for the review and final viva
- Synopsis for topic approval, if your college asks for one
E&TC / ECE viva questions on this project
What is the aim of the TV Remote Controlled Home Appliances project?
A system to switch home appliances with an ordinary TV remote. The IR receiver decodes the remote's signals and the controller switches the matching appliance.
Explain the working of your project in short.
Voltage regulator / buck converter and 12 V power adapter / step-down transformer supply the circuit; a regulator gives the controller and sensors a steady 5 V. The Push buttons and switches provide manual inputs and the power switch. The 8051 microcontroller with board runs the embedded C program that scans inputs and controls the outputs through its four I/O ports. The IR receiver and remote receives commands from an infrared remote.
What is the architecture of the 8051 microcontroller?
The 8051 is an 8-bit Harvard-architecture microcontroller with 4 KB ROM (8 KB in AT89S52), 128 bytes RAM, four 8-bit I/O ports, two 16-bit timers, a UART and five interrupt sources.
Why is a pull-up resistor needed with a push button?
Without it the input pin floats and reads random values. The pull-up keeps it HIGH until the button connects it to ground.
Why does the TSOP receiver need a 38 kHz signal?
The remote modulates its IR light at 38 kHz so the receiver can reject sunlight and lamp light, which are not modulated. Only pulses at 38 kHz are decoded.
Why is a relay used?
It electrically isolates the 5 V control circuit from the high-voltage load. The controller energises the coil through a transistor, and the contacts switch the load.
Why can't the motor be connected directly to the microcontroller?
A motor needs far more current (hundreds of mA to amps) than a controller pin can supply (about 20–40 mA). The H-bridge driver switches the motor current and allows direction control.
Explain the block diagram of your project.
The input section senses the real-world quantity, the 8051 microcontroller with board processes it according to the program, and the output section displays the result and drives the actuators. The power supply section feeds every block.
Which communication protocols are used between the modules?
Analog inputs read by the ADC for the analog sensors. Each protocol was chosen because the module supports it and it uses the fewest pins.
What is the operating voltage of the circuit?
The controller and most sensors work at 5 V (ESP boards and some modules at 3.3 V). A 12 V adapter powers the board, and a regulator steps it down. Motors and relays get their own supply line so they do not reset the controller.
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Want to build TV Remote Controlled Home Appliances?
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