E&TC / ECE · Embedded and digital electronics · Final year project
Mini Can Cooler Fridge Using Peltier
A mini fridge that cools drink cans using two Peltier modules. Heat sinks and fans remove heat from the hot side while the insulated chamber keeps cans cold.
What is the Mini Can Cooler Fridge Using Peltier project?
A mini fridge that cools drink cans using two Peltier modules. Heat sinks and fans remove heat from the hot side while the insulated chamber keeps cans cold.
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
- ₹7,500 – ₹11,100
- Guidance from
- ₹9,999 (Hardware / IoT Final Year)
How the Mini Can Cooler Fridge Using Peltier works
- 12 V power adapter / step-down transformer supplies the circuit; a regulator gives the controller and sensors a steady 5 V.
- The 4×4 matrix keypad lets the user enter a PIN, amount or settings.
- The Microcontroller board processes sensor inputs and controls the outputs according to the program.
- The Peltier module cools one side and heats the other when current flows.
- The DC cooling fan moves air for cooling or ventilation.
- The 16×2 LCD with I2C adapter shows readings, status and messages to the user.
Block diagram
Inputs
4×4 matrix keypadController
Microcontroller boardOutputs
Peltier moduleDC cooling fan16×2 LCD with I2C adapterComponents 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 |
|---|---|---|---|
| Microcontroller board | 1 | Processes sensor inputs and controls the outputs according to the program. | ₹400 |
| 4×4 matrix keypad | 1 | Lets the user enter a PIN, amount or settings. | ₹90 |
| Peltier module (TEC1-12706) | 1 | Cools one side and heats the other when current flows. | ₹300 |
| DC cooling fan (12 V) | 1 | Moves air for cooling or ventilation. | ₹120 |
| 16×2 LCD with I2C adapter | 1 | Shows readings, status and messages to the user. | ₹220 |
| 12 V power adapter / step-down transformer | 1 | Supplies stable low-voltage power from the mains. | ₹250 |
| Mild steel frame and fabrication | 2 | Forms the main structure that holds all parts. | ₹5,000 |
| Heatsink | 1 | Part from the design specification | ₹150* |
| Thermal Paste | 1 | Part from the design specification | ₹150* |
| Electronics Components | 1 | Part from the design specification | ₹150* |
| Thermal Isolator | 1 | Part from the design specification | ₹150* |
| Passive components, PCB and wiring kit | 1 | Cables, connectors and jumper wires, PCB / breadboard, enclosure, mounts and fasteners, resistors (assorted) and capacitors (assorted). | ₹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; 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 | ₹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 Mini Can Cooler Fridge Using Peltier project?
A mini fridge that cools drink cans using two Peltier modules. Heat sinks and fans remove heat from the hot side while the insulated chamber keeps cans cold.
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 4×4 matrix keypad lets the user enter a PIN, amount or settings. The Microcontroller board processes sensor inputs and controls the outputs according to the program. The Peltier module cools one side and heats the other when current flows.
What is the difference between a microprocessor and a microcontroller?
A microprocessor is only a CPU and needs external memory and I/O chips. A microcontroller has the CPU, RAM, ROM, timers and I/O on a single chip, which makes it cheaper and better for dedicated control tasks.
How does the controller read a matrix keypad?
It drives one row LOW at a time and reads the columns. A key press connects a row to a column, so the row-column pair identifies the key with only 8 pins for 16 keys.
What is the Peltier effect?
When current passes through a junction of two different semiconductors, heat is absorbed on one side and released on the other, so the module works as a solid-state cooler or heater.
How can fan speed be varied?
With PWM through a MOSFET: changing the duty cycle changes the average voltage and therefore the speed.
Why is an I2C adapter used with the LCD?
It reduces the wiring from about 10 pins to 2 (SDA and SCL), leaving more controller pins free for sensors.
Explain the block diagram of your project.
The input section senses the real-world quantity, the Microcontroller 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?
I2C for the display, RTC or motion sensor (only SDA and SCL lines). 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 Mini Can Cooler Fridge Using Peltier?
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