E&TC / ECE · Embedded and digital electronics · Final year project
Design & Fabrication of Mini Air Blower
A small air blower built from a DC motor and custom impeller blades in a circular housing. It draws air in from one side and pushes it out with force from the other, for cooling and cleaning tasks.
What is the Design & Fabrication of Mini Air Blower project?
A small air blower built from a DC motor and custom impeller blades in a circular housing. It draws air in from one side and pushes it out with force from the other, for cooling and cleaning tasks.
Key facts
- Type
- Final year project · Intermediate
- Suitable for
- Diploma capstone and B.E / B.Tech final year
- Build time
- 4 to 6 weeks
- Estimated component cost
- ₹7,500 – ₹11,100
- Guidance from
- ₹9,999 (Hardware / IoT Final Year)
How the Design & Fabrication of Mini Air Blower works
- 12 V power adapter / step-down transformer supplies the circuit; a regulator gives the controller and sensors a steady 5 V.
- The Arduino Uno R3 reads the inputs, runs the decision logic written in C/C++ and drives the outputs.
- The DC geared motor provides the driving motion.
- The DC cooling fan moves air for cooling or ventilation.
Block diagram
Controller
Arduino Uno R3Outputs
DC geared motorDC cooling fanComponents 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 |
|---|---|---|---|
| Arduino Uno R3 | 1 | Reads the inputs, runs the decision logic written in C/C++ and drives the outputs. | ₹550 |
| DC geared motor | 1 | Provides the driving motion. | ₹250 |
| DC cooling fan (12 V) | 1 | Moves air for cooling or ventilation. | ₹120 |
| 12 V power adapter / step-down transformer | 1 | Supplies stable low-voltage power from the mains. | ₹250 |
| Tank, nozzle and plumbing | 1 | Stores and delivers the fluid. | ₹450 |
| Shafts (machined) | 1 | Transmit rotation and torque. | ₹400 |
| Mild steel frame and fabrication | 2 | Forms the main structure that holds all parts. | ₹5,000 |
| Passive components, PCB and wiring kit | 1 | Enclosure, mounts and fasteners, resistors (assorted), capacitors (assorted), PCB / breadboard and cables, connectors and jumper wires. | ₹610 |
| 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 | ₹7,500 – ₹11,100 |
Prices are estimates for budgeting. 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 | ₹7,500 – ₹11,100 |
| 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 |
No GST and no hidden charges. Use the cost calculator for a quote with your deadline and add-ons, or see all plans.
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 Design & Fabrication of Mini Air Blower project?
A small air blower built from a DC motor and custom impeller blades in a circular housing. It draws air in from one side and pushes it out with force from the other, for cooling and cleaning tasks.
Explain the working of your project in short.
12 V power adapter / step-down transformer supplies the circuit; a regulator gives the controller and sensors a steady 5 V. The Arduino Uno R3 reads the inputs, runs the decision logic written in C/C++ and drives the outputs. The DC geared motor provides the driving motion. The DC cooling fan moves air for cooling or ventilation.
What microcontroller is on the Arduino Uno and what are its key specifications?
The Uno uses the ATmega328P: 8-bit, 16 MHz clock, 32 KB flash, 2 KB SRAM, 14 digital I/O pins (6 PWM) and 6 analog inputs with a 10-bit ADC.
Why is a geared motor used?
The gearbox reduces speed and multiplies torque, so a small DC motor can move a vehicle or mechanism smoothly. Torque increases roughly by the gear ratio.
How can fan speed be varied?
With PWM through a MOSFET: changing the duty cycle changes the average voltage and therefore the speed.
How is 230 V AC converted to 5 V DC for the circuit?
A transformer steps down the voltage, a bridge rectifier converts AC to pulsating DC, a capacitor smooths it and a 7805 regulator gives a steady 5 V.
How does nozzle size affect spraying?
A smaller nozzle gives finer droplets and better coverage at higher pressure, while a larger nozzle gives higher flow with coarser droplets.
Explain the block diagram of your project.
The input section senses the real-world quantity, the Arduino Uno R3 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?
The sensors give digital or analog signals read directly by the controller's I/O and ADC pins, and outputs are driven through transistor or relay drivers.
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 Design & Fabrication of Mini Air Blower?
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