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1. Smart IR Remote Control Using Arduino
Overview:
This project allows users to control multiple appliances (TV, fan, lights) using a single infrared (IR) remote.
Components Required:
- Arduino Uno
- IR Receiver (TSOP1738)
- Remote Control
- Relay Module
- LED, Resistors, Jumper Wires
Working Principle:
- The IR receiver captures signals from the remote.
- Arduino decodes the signal and activates the corresponding relay.
- The relay turns the appliance ON or OFF.
Application:
Used in smart homes to control appliances wirelessly.
2. Traffic Light Controller Using 555 Timer IC
Overview:
A simple circuit to control traffic lights using the 555 timer IC.
Components Required:
- 555 Timer IC
- LEDs (Red, Yellow, Green)
- Resistors, Capacitors
- Power Supply (9V Battery)
Working Principle:
- The 555 timer IC generates a pulse to change light states (Red → Yellow → Green).
- The cycle repeats with predefined delays.
Application:
Used in traffic management systems to regulate vehicle movement.
3. GSM-Based Home Automation System
Overview:
Control home appliances using a mobile phone and a GSM module.
Components Required:
- Arduino Uno
- GSM Module (SIM800L)
- RRelays
- Bulbs, Fans, Switches
Working Principle:
- Users send an SMS command (e.g., "TURN ON LIGHT").
- The GSM module receives the message and instructs Arduino.
- Arduino controls relays to turn devices ON/OFF.
Application:
Enables remote control of household appliances..
4. Automatic Room Light Controller Using PIR Sensor
Overview:
A smart lighting system that automatically turns lights ON/OFF based on human presence.
Components Required:
- PIR Sensor
- Arduino Uno
- Relay Module
- LED Bulbs
Working Principle:
- The PIR sensor detects human motion.
- Arduino processes the signal and turns ON/OFF lights accordingly.
Application:
Used in energy-saving smart homes and offices.
55. FM Transmitter Circuit
Overview:
A simple FM transmitter for short-range audio broadcasting.
Components Required:
- Transistor BC547
- Capacitors & Resistors
- Inductor Coil
- Electret Microphone
Working Principle:
- The microphone captures audio signals.
- The circuit modulates the signal onto an FM carrier wave.
- The transmitted signal is received by an FM radio.
Application:
Used in wireless communication and radio broadcasting.
6. Line Following Robot
Overview:
A robot that follows a predefined path using IR sensors.
Components Required:
- Arduino Uno
- IR Sensor Module
- DC Motors & Motor Driver
- Chassis & Wheels
Working Principle:
- The IR sensors detect the black line on a white surface.
- The Arduino processes the signals and controls motor movement.
Application:
Used in automated material handling in industries.
7. Digital Voltmeter Using Arduino
Overview:
A digital voltmeter that measures DC voltage and displays it on an LCD.
Components Required:
- Arduino Uno
- LCD Display (16x2)
- Voltage Divider Circuit
- Jumper Wires
Working Principle:
- The voltage is measured using an analog pin of Arduino.
- The measured value is processed and displayed on the LCD.
Application:
Used in power supply testing and electrical troubleshooting.
8. Temperature and Humidity Monitoring System
Overview:
A real-time monitoring system that measures temperature and humidity.
Components Required:
- Arduino Uno
- LEDs (Red, Yellow, Green)
- LCD Display (16x2)
- Jumper Wires
Working Principle:
- TThe DHT11 sensor reads temperature and humidity data.
- Arduino processes the data and displays it on the LCD.
Application:
Used in weather stations and agricultural monitoring systems.
9. Water Level Indicator Using Ultrasonic Sensor
Overview:
A system that monitors water levels in tanks using an ultrasonic sensor.
Components Required:
- Ultrasonic Sensor (HC-SR04)
- Arduino Uno
- Buzzer & LED Indicators
Working Principle:
- The ultrasonic sensor measures the water level.
- Arduino processes the data and triggers a buzzer when the water level is low.
Application:
Used in water tanks to prevent overflow and dry running of pumps.
10. Bluetooth-Controlled Car
Overview:
A wireless car controlled using a smartphone via Bluetooth.
Components Required:
- Arduino Uno
- HC-05 Bluetooth Module
- Motor Driver (L298N)
- DC Motors & Wheels
Working Principle:
- The Bluetooth module receives commands from a mobile app.
- Arduino processes the commands and controls the motor driver.
Application:
Used in robotics and remote-controlled vehicles.
Conclusion
These mini projects will help Diploma students in Electronics and Telecommunication Engineering gain hands-on experience in circuit design and programming. Whether you are a beginner or an advanced learner, these projects will enhance your skills and prepare you for real-world applications.
