E&TC / ECE · GSM and GPS · Final year project
Ebike Speed Controller System Stm32
A speed controller for an electric bike built on an STM32. It reads the throttle and a wheel speed sensor, drives the hub motor through a motor driver and shows the speed on an OLED display.
What is the Ebike Speed Controller System Stm32 project?
A speed controller for an electric bike built on an STM32. It reads the throttle and a wheel speed sensor, drives the hub motor through a motor driver and shows the speed on an OLED display.
Key facts
- Branch
- Electronics & Telecommunication (E&TC / ECE); also suits Electrical, Instrumentation
- Domain
- GSM and GPS projects
- 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
- ₹32,100 – ₹47,200
- Guidance from
- ₹9,999 (Hardware / IoT Final Year)
How the Ebike Speed Controller System Stm32 works
- Rechargeable battery 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 Motor driver lets the low-current controller run the motors forward, reverse and at variable speed.
- The 0.96-inch OLED display shows readings and graphics on a compact, high-contrast screen.
Block diagram
Controller
Arduino Uno R3Outputs
Motor driver0.96-inch OLED displayComponents 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 |
| Motor driver (L298N) | 1 | Lets the low-current controller run the motors forward, reverse and at variable speed. | ₹180 |
| 0.96-inch OLED display | 1 | Shows readings and graphics on a compact, high-contrast screen. | ₹250 |
| Rechargeable battery (12 V 1.3–7 Ah) | 1 | Stores energy and supplies power when mains is absent. | ₹650 |
| Valves (solenoid / direction control) | 1 | Control the direction and flow of air or fluid. | ₹900 |
| Shafts (machined) | 1 | Transmit rotation and torque. | ₹400 |
| Gears / rack and pinion | 1 | Transfer motion and change speed or torque. | ₹500 |
| BLDC hub motor 250-350 W | 1 | Needed for this type of build. | ₹7,500 |
| Motor controller with throttle | 1 | Needed for this type of build. | ₹2,900 |
| Li-ion battery pack 36 V 10 Ah with BMS | 1 | Needed for this type of build. | ₹14,500 |
| Base frame / bicycle and fabrication | 1 | Needed for this type of build. | ₹6,500 |
| Brakes, cables and wiring | 1 | Needed for this type of build. | ₹1,400 |
| Passive components, PCB and wiring kit | 1 | Resistors (assorted), capacitors (assorted), PCB / breadboard and cables, connectors and jumper wires. | ₹310 |
| 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 | ₹32,100 – ₹47,200 |
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 | ₹32,100 – ₹47,200 |
| 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 Ebike Speed Controller System Stm32 project?
A speed controller for an electric bike built on an STM32. It reads the throttle and a wheel speed sensor, drives the hub motor through a motor driver and shows the speed on an OLED display.
Explain the working of your project in short.
Rechargeable battery 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 Motor driver lets the low-current controller run the motors forward, reverse and at variable speed. The 0.96-inch OLED display shows readings and graphics on a compact, high-contrast screen.
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 can't the motor be connected directly to the microcontroller?
A motor needs far more current (hundreds of mA to amps) than a controller pin can supply (about 20–40 mA). The H-bridge driver switches the motor current and allows direction control.
What is the advantage of OLED over LCD?
Each pixel emits its own light, so no backlight is needed. It gives better contrast and viewing angles and uses less power for dark screens.
How do you calculate battery backup time?
Backup time (hours) ≈ battery capacity (Ah) × voltage × 0.8 efficiency ÷ load power (W). For example, 12 V 7 Ah at 20 W gives about 3.3 hours.
What does a 5/2 direction control valve mean?
It has 5 ports (one supply, two outlets and two exhausts) and 2 positions. Switching positions reverses which side of the cylinder receives air.
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?
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). 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 did you calculate the power rating of your system?
Using P = V × I for each load, adding a margin of 20 to 25%. Battery capacity is the energy needed per day divided by the battery voltage and allowable depth of discharge.
What is the difference between accuracy and precision?
Accuracy is how close a reading is to the true value. Precision is how close repeated readings are to each other. A sensor can be precise but inaccurate if it is not calibrated.
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