E&TC / ECE · Healthcare electronics · Final year project
Raspberry Pi Wheelchair With Safety System
A Raspberry Pi wheelchair with safety features. The user gives directions on a graphical LCD controller sent by RF, and an emergency help feature alerts caregivers.
What is the Raspberry Pi Wheelchair With Safety System project?
A Raspberry Pi wheelchair with safety features. The user gives directions on a graphical LCD controller sent by RF, and an emergency help feature alerts caregivers.
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
- ₹8,800 – ₹12,900
- Guidance from
- ₹9,999 (Hardware / IoT Final Year)
How the Raspberry Pi Wheelchair With Safety System 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 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 GSM module sends SMS alerts or makes calls to the registered phone number using a normal SIM card.
- The GPS module receives satellite signals and gives the latitude and longitude of the device.
- The DC geared motor provides the driving motion.
- The TFT touch display provides a colour interface with touch input.
- The LEDs indicate status.
Block diagram
Inputs
Sound sensor modulePush buttons and switchesController
Raspberry Pi 4Communication
GSM moduleGPS module433 MHz RF transmitter-receiver pairOutputs
DC geared motorTFT touch displayLEDsComponents 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 |
| Push buttons and switches | 2 | Provide manual inputs and the power switch. | ₹80 |
| GSM module (SIM800L) | 1 | Sends SMS alerts or makes calls to the registered phone number using a normal SIM card. | ₹450 |
| GPS module (NEO-6M) | 1 | Receives satellite signals and gives the latitude and longitude of the device. | ₹650 |
| 433 MHz RF transmitter-receiver pair | 1 | Sends the remote's button press wirelessly to the receiver circuit. | ₹150 |
| DC geared motor | 1 | Provides the driving motion. | ₹250 |
| TFT touch display (2.4–3.5 inch) | 1 | Provides a colour interface with touch input. | ₹650 |
| 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 |
| 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 | ₹8,800 – ₹12,900 |
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 | ₹8,800 – ₹12,900 |
| 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 Raspberry Pi Wheelchair With Safety System project?
A Raspberry Pi wheelchair with safety features. The user gives directions on a graphical LCD controller sent by RF, and an emergency help feature alerts caregivers.
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 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.
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.
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.
How does the GSM module send an SMS?
The microcontroller sends AT commands over serial, for example AT+CMGF=1 to select text mode and AT+CMGS with the phone number followed by the message. The module transmits it over the mobile network.
How does a GPS module find its location?
It receives timing signals from at least four satellites, calculates the distance to each from the signal delay and solves for its position. The module outputs NMEA sentences like $GPGGA with latitude, longitude and time.
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 SPI for the RFID reader or radio module. 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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