E&TC / ECE · Healthcare electronics · Final year project
Ultrasonic Blind Stick With GPS Tracking
A smart walking stick for blind people with GPS tracking. An ultrasonic sensor beeps when obstacles are near, a probe detects water ahead, and family can track the user's location.
What is the Ultrasonic Blind Stick With GPS Tracking project?
A smart walking stick for blind people with GPS tracking. An ultrasonic sensor beeps when obstacles are near, a probe detects water ahead, and family can track the user's location.
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
- ₹3,700 – ₹5,400
- Guidance from
- ₹9,999 (Hardware / IoT Final Year)
How the Ultrasonic Blind Stick With GPS Tracking works
- Rechargeable battery and 12 V power adapter / step-down transformer supply the circuit; a regulator gives the controller and sensors a steady 5 V.
- The LDR light sensor senses whether it is light or dark so lights can switch automatically.
- The Water / rain level sensor detects the presence or level of water.
- The Push buttons and switches provide manual inputs and the power switch.
- The ATmega328P microcontroller with base board is the brain of the circuit: it samples the sensors, compares readings with set limits and switches the outputs.
- 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 16×2 LCD with I2C adapter shows readings, status and messages to the user.
- The Buzzer gives an audible alert.
- The LEDs indicate status.
Block diagram
Inputs
LDR light sensorWater / rain level sensorPush buttons and switchesController
ATmega328P microcontroller with base boardCommunication
GSM moduleGPS moduleOutputs
16×2 LCD with I2C adapterBuzzerLEDsComponents 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 |
|---|---|---|---|
| ATmega328P microcontroller with base board | 1 | Is the brain of the circuit: it samples the sensors, compares readings with set limits and switches the outputs. | ₹350 |
| LDR light sensor | 1 | Senses whether it is light or dark so lights can switch automatically. | ₹15 |
| Water / rain level sensor | 1 | Detects the presence or level of water. | ₹70 |
| Push buttons and switches | 1 | Provide manual inputs and the power switch. | ₹40 |
| 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 |
| 16×2 LCD with I2C adapter | 1 | Shows readings, status and messages to the user. | ₹220 |
| Buzzer | 1 | Gives an audible alert. | ₹20 |
| LEDs (assorted) | 1 | Indicate status. | ₹20 |
| Rechargeable battery (12 V 1.3–7 Ah) | 1 | Stores energy and supplies power when mains is absent. | ₹650 |
| 12 V power adapter / step-down transformer | 1 | Supplies stable low-voltage power from the mains. | ₹250 |
| Passive components, PCB and wiring kit | 1 | Resistors (assorted), capacitors (assorted), transistors / MOSFETs, cables, connectors and jumper wires, diodes and PCB / breadboard. | ₹370 |
| 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 | ₹3,700 – ₹5,400 |
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 | ₹3,700 – ₹5,400 |
| 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 Ultrasonic Blind Stick With GPS Tracking project?
A smart walking stick for blind people with GPS tracking. An ultrasonic sensor beeps when obstacles are near, a probe detects water ahead, and family can track the user's location.
Explain the working of your project in short.
Rechargeable battery and 12 V power adapter / step-down transformer supply the circuit; a regulator gives the controller and sensors a steady 5 V. The LDR light sensor senses whether it is light or dark so lights can switch automatically. The Water / rain level sensor detects the presence or level of water. The Push buttons and switches provide manual inputs and the power switch.
Why is a microcontroller used in this project?
A microcontroller combines a CPU, memory and I/O pins on one chip, so a single low-cost IC can read sensors, make decisions in code and control loads without a computer.
How does an LDR work?
An LDR is made of cadmium sulphide. In light its resistance drops to a few hundred ohms, and in darkness it rises to about a megaohm. Used in a voltage divider, it gives a voltage that depends on light.
How is water detected by this sensor?
The exposed conductive tracks are open circuit when dry. Water bridges them and lowers the resistance, and the controller reads the change as a level or as rain.
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.
Explain the block diagram of your project.
The input section senses the real-world quantity, the ATmega328P microcontroller with base board 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, I2C for the display, RTC or motion sensor (only SDA and SCL lines) and 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). The battery 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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