E&TC / ECE · Healthcare electronics · Final year project
Smart Stand-up Wheelchair using Raspberry Pi and RF Controller
A Raspberry Pi wheelchair that can raise the user to a standing position. It is controlled by an RF remote with a graphical LCD, and an emergency button sends the user's GPS location by SMS.
What is the Smart Stand-up Wheelchair using Raspberry Pi and RF Controller project?
A Raspberry Pi wheelchair that can raise the user to a standing position. It is controlled by an RF remote with a graphical LCD, and an emergency button sends the user's GPS location by SMS.
Key facts
- Branch
- Electronics & Telecommunication (E&TC / ECE); also suits Biomedical
- 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
- ₹7,900 – ₹11,600
- Guidance from
- ₹9,999 (Hardware / IoT Final Year)
How the Smart Stand-up Wheelchair using Raspberry Pi and RF Controller works
- 12 V power adapter / step-down transformer supplies the circuit; a regulator gives the controller and sensors a steady 5 V.
- The Sound sensor module detects noise level or sound events.
- The Accelerometer-gyroscope measures tilt, motion and sudden impacts.
- The Push buttons and switches provide manual inputs and the power switch.
- The Raspberry Pi 4 runs Linux and the main program, handles the camera, networking and heavier processing such as image recognition.
- The 433 MHz RF transmitter-receiver pair sends the remote's button press wirelessly to the receiver circuit.
- The Bluetooth module links the circuit to a smartphone app so the user can send commands or receive readings.
- The Servo motor rotates to an exact angle, used for locks, arms and flaps.
- The LEDs indicate status.
Block diagram
Inputs
Sound sensor moduleAccelerometer-gyroscopePush buttons and switchesController
Raspberry Pi 4Communication
433 MHz RF transmitter-receiver pairBluetooth moduleOutputs
Servo motorLEDsComponents 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 |
|---|---|---|---|
| Raspberry Pi 4 (2 GB) | 1 | Runs Linux and the main program, handles the camera, networking and heavier processing such as image recognition. | ₹4,800 |
| Sound sensor module | 1 | Detects noise level or sound events. | ₹70 |
| Accelerometer-gyroscope (MPU6050) | 1 | Measures tilt, motion and sudden impacts. | ₹180 |
| Push buttons and switches | 2 | Provide manual inputs and the power switch. | ₹80 |
| 433 MHz RF transmitter-receiver pair | 1 | Sends the remote's button press wirelessly to the receiver circuit. | ₹150 |
| Bluetooth module (HC-05) | 1 | Links the circuit to a smartphone app so the user can send commands or receive readings. | ₹280 |
| Servo motor (MG996R / SG90) | 1 | Rotates to an exact angle, used for locks, arms and flaps. | ₹350 |
| LEDs (assorted) | 1 | Indicate status. | ₹20 |
| 12 V power adapter / step-down transformer | 1 | Supplies stable low-voltage power from the mains. | ₹250 |
| Wheels / castor wheels | 1 | Allow the machine or vehicle to move. | ₹400 |
| microSD card 32 GB (Class 10) | 1 | Needed for this type of build. | ₹450 |
| Official 5 V 3 A USB-C supply for Raspberry Pi | 1 | Needed for this type of build. | ₹450 |
| Rs Pi Display Module | 1 | Part from the design specification | ₹150* |
| Passive components, PCB and wiring kit | 1 | Resistors (assorted), capacitors (assorted), transistors / MOSFETs, cables, connectors and jumper wires, diodes, PCB / breadboard and ICs and IC sockets. | ₹430 |
| 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 | ₹7,900 – ₹11,600 |
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 | ₹7,900 – ₹11,600 |
| 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 Smart Stand-up Wheelchair using Raspberry Pi and RF Controller project?
A Raspberry Pi wheelchair that can raise the user to a standing position. It is controlled by an RF remote with a graphical LCD, and an emergency button sends the user's GPS location by SMS.
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 Sound sensor module detects noise level or sound events. The Accelerometer-gyroscope measures tilt, motion and sudden impacts. The Push buttons and switches provide manual inputs and the power switch.
Why did you choose a Raspberry Pi instead of an Arduino?
The Raspberry Pi is a full computer with an operating system, so it can run Python, OpenCV and a web server. An Arduino is a microcontroller that is better for simple real-time control but cannot process images or run multiple programs.
How does the sound sensor measure noise?
A condenser microphone converts sound into a small voltage, which is amplified. The analog output rises with loudness and a comparator gives a digital trigger.
How does an accelerometer detect a fall or accident?
It measures acceleration on three axes. A sudden spike above a threshold, followed by an unusual orientation, indicates a fall or collision.
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 are encoder and decoder ICs used with the RF module?
The HT12E encoder converts parallel button inputs into a serial code with an address, and the HT12D decoder on the receiver checks the address and restores the outputs. This prevents interference from other remotes.
Explain the block diagram of your project.
The input section senses the real-world quantity, the Raspberry Pi 4 processes it according to the program, and the output section acts locally and sends the data or alert wirelessly. The power supply section feeds every block.
Which communication protocols are used between the modules?
UART (serial) for the GSM, GPS, Bluetooth or fingerprint modules and 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.
How do you ensure patient safety?
The device runs on low-voltage batteries, has no direct mains connection to the patient, uses isolated sensors and limits current through any electrode. Alarms are set for abnormal readings.
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