Arduino is one of the most popular microcontroller platforms for hobbyists, students, engineers, and DIY creators. It makes learning electronics and programming fun and highly rewarding. The team at Techatronic.com has published hundreds of Arduino-based projects — from basic sensor interfacing to robotics and automation.
In this post, we’ve curated 99 exciting Arduino projects from Techatronic that range in difficulty from beginner to advanced. Each project includes a link to the original tutorial on Techatronic.com so you can explore the full circuit, code, and explanation.
⭐ Beginner Arduino Projects
These projects are great for people just getting started with Arduino.
1️⃣ Heart Beat Sensor Using Arduino | BPM Monitor
🔗 https://techatronic.com/arduino-projects-for-beginner/
This Heart Beat Sensor project using Arduino is designed to measure a person’s heart rate in beats per minute (BPM) using a simple pulse sensor. The sensor works on the principle of photoplethysmography, where light intensity changes based on blood flow through the finger. When a finger is placed on the sensor, it detects pulse variations and sends analog signals to the Arduino.
Arduino processes these signals, filters noise, and calculates the BPM by measuring the time interval between pulses. The result can be displayed on the Serial Monitor or an LCD display. This project helps beginners understand analog sensor interfacing, signal processing basics, and real-time data calculation.
It is widely used as a foundation project for health monitoring systems, wearable devices, and IoT medical applications. Students also learn how to calibrate sensors and improve accuracy. This project is beginner-friendly yet impactful, making it ideal for Arduino learners interested in biomedical electronics.
2️⃣ Automatic Door Opener With Sensor And Arduino
🔗 https://techatronic.com/arduino-projects-for-beginner/
The Automatic Door Opener project uses Arduino along with a motion or proximity sensor to open and close doors automatically when a person approaches. Typically, an IR sensor or ultrasonic sensor detects movement, and a servo motor or DC motor is used to operate the door mechanism.
When motion is detected, Arduino triggers the motor to open the door. After a short delay, the door closes automatically. This project introduces beginners to sensor-based automation, motor control, and basic decision-making logic in Arduino programming.
Such systems are commonly used in shopping malls, hospitals, offices, and smart homes. The project helps learners understand real-world automation concepts and improves their confidence in building practical Arduino applications.
3️⃣ Arduino with LED Project Using Rotary Encoder
🔗 https://techatronic.com/arduino-projects-for-beginner/
This project demonstrates how to control LEDs using a rotary encoder and Arduino. A rotary encoder is an input device that can detect rotation direction and steps, making it more advanced than a simple potentiometer.
By rotating the encoder knob, users can increase or decrease LED brightness or switch between LEDs. Arduino reads the encoder’s pulses and updates the LED output accordingly using PWM (Pulse Width Modulation).
This project teaches beginners how to work with digital inputs, interrupts, and precise control mechanisms. Rotary encoders are commonly used in audio systems, menu navigation, and industrial controls, making this project highly practical and educational.
4️⃣ Automatic Light Microwave Motion Sensor
🔗 https://techatronic.com/arduino-projects-for-beginner/
This Arduino project uses a microwave motion sensor to automatically turn lights ON or OFF based on human movement. Unlike PIR sensors, microwave sensors use Doppler radar technology, offering better sensitivity and coverage.
When motion is detected, the sensor sends a signal to Arduino, which activates a relay to turn on the light. After no movement is detected for a defined time, the light turns off automatically.
This project is ideal for understanding energy-efficient lighting systems and smart automation. It is commonly used in staircases, parking areas, and security lighting applications.
5️⃣ LPG Gas Leakage Detector Using Arduino
🔗 https://techatronic.com/arduino-projects-for-beginner/
The LPG Gas Leakage Detector project uses an MQ-series gas sensor with Arduino to detect harmful gas leaks. When LPG concentration exceeds a safe threshold, Arduino triggers an alarm using a buzzer and LED.
This project introduces learners to gas sensors, analog signal reading, threshold comparison, and safety systems. It plays a crucial role in domestic and industrial safety, making it both educational and socially valuable.
6️⃣ Music Reactive LED Using Arduino
🔗 https://techatronic.com/arduino-projects-for-beginner/
The Music Reactive LED project using Arduino creates a visually engaging system where LEDs respond dynamically to sound or music. This project uses a sound sensor or microphone module to capture audio signals. When music plays, the sensor converts sound waves into electrical signals that are read by the Arduino.
Arduino processes the signal intensity and controls LEDs accordingly—brighter sounds produce stronger LED effects, while softer sounds create dimmer lighting. Depending on the programming, LEDs can blink, fade, or change patterns in sync with the music.
This project introduces beginners to audio signal processing, analog input handling, and PWM-based LED control. It is widely used in DJ lighting, home decoration, and entertainment systems. Beginners also learn how to filter noise and adjust sensitivity for better performance. This project is simple, fun, and a great way to understand real-time sensor interaction.
7️⃣ Arduino RF Module Automatic Door
🔗 https://techatronic.com/arduino-projects-for-beginner/
This project demonstrates how to build an automatic door system controlled wirelessly using Arduino and an RF (Radio Frequency) module. It uses a transmitter and receiver pair to send commands over a short distance.
When a button is pressed on the transmitter side, a signal is sent to the Arduino receiver. Based on the received signal, Arduino activates a motor or servo to open or close the door. This project teaches the basics of wireless communication, encoding and decoding signals, and motor control.
RF-based automation is widely used in remote controls, garage doors, and security systems. For beginners, this project provides an excellent introduction to wireless Arduino applications without needing Wi-Fi or Bluetooth.
8️⃣ Hall Effect Sensor With Arduino
🔗 https://techatronic.com/arduino-projects-for-beginner/
The Hall Effect Sensor project uses Arduino to detect magnetic fields. A Hall sensor outputs a signal when it comes near a magnet, which Arduino reads and processes.
This project is commonly used for speed measurement, position sensing, and proximity detection. Beginners learn how to interface digital sensors, interpret output signals, and trigger actions such as LEDs or buzzers.
Hall effect sensors are widely used in motor speed control, door sensors, and industrial automation, making this project extremely practical and educational.
9️⃣ Arduino IR Remote Control Project
🔗 https://techatronic.com/arduino-ir-remote-control-project/
This project allows you to control devices using an IR remote and Arduino. An IR receiver module detects infrared signals from a remote and sends them to Arduino.
Arduino decodes the received signal and performs actions like turning LEDs ON/OFF or controlling appliances via relays. This project teaches IR communication protocols, remote decoding, and input-based decision-making.
It forms the foundation for home automation systems, TV remote controls, and smart electronics projects.
🔟 Touch Switch Using Arduino and Touch Sensor
🔗 https://techatronic.com/touch-switch-using-arduino-and-touch-sensor/
The Touch Switch project replaces traditional mechanical switches with a capacitive touch sensor. When a finger touches the sensor, Arduino detects the change in capacitance and toggles an output device like an LED or relay.
This project introduces beginners to touch-based input systems, debouncing logic, and modern user interfaces. Touch switches are widely used in smart appliances, home automation panels, and consumer electronics.
🛠️ Intermediate Arduino Projects
Once you’ve grasped the basics, challenge yourself with these intermediate projects that integrate sensors, displays, robotics, and more:
- Smart Irrigation System Using Arduino – https://techatronic.com/smart-irrigation-system-using-arduino/
- Smart Water Heater Using Arduino (DIY Project) – https://techatronic.com/smart-water-heater-using-arduino-diy-project/
- Arduino Servo Control Using Potentiometer – https://techatronic.com/arduino-servo-control-using-potentiometer/
- Automatic School Bell Arduino Project – https://techatronic.com/automatic-school-bell-arduino-project/
- Colour Sorting Machine (Arduino + TCS3200) – https://techatronic.com/category/arduino-projects/
- Sun Tracking Solar Panel using Arduino – https://techatronic.com/category/arduino-projects/
- Accident Roadside Alert System with Arduino – https://techatronic.com/category/arduino-projects/
- Rain Detection Cloth Project – https://techatronic.com/category/arduino-projects/
- Arduino Smart Dustbin With IR Sensor – https://techatronic.com/category/arduino-projects/page/9/
- Fire Security System With Flame Sensor and Arduino – https://techatronic.com/category/arduino-projects/page/9/
🤖 Advanced Arduino Projects
These projects bring in advanced interfacing, robotics, automation, and smart systems.
- Fire Fighting Robot Autonomous + BT Control – https://techatronic.com/category/arduino-projects/
- Building an Air Quality Monitoring System Using Arduino & IoT – https://techatronic.com/category/arduino-projects/
- Voice Control Robot + Obstacle Avoiding – https://techatronic.com/category/arduino-projects/
- Robotic Arm with Servo Motor Using Arduino – https://techatronic.com/category/arduino-projects/page/9/
- Ultrasonic Range Finder Using Arduino and LCD – https://techatronic.com/category/arduino-projects/page/9/
- Radar Using Arduino and Ultrasonic Sensor – https://techatronic.com/radar-using-arduino-ultrasonic-sensor/
- Automatic Railway Gate Control Using Arduino & IR – https://techatronic.com/category/arduino-projects/page/9/
📌 Tips for Choosing Your Next Project
- Beginners: Start with simple sensor projects like LEDs, buzzers, and IR remotes.
- Intermediate: Integrate displays, multiple sensors, and automation.
- Advanced: Try robotics, IoT data systems, or environmental monitoring with Arduino and external modules.
🚀 Final Thoughts
Arduino is a versatile platform that grows with you. Whether you are just starting or have years of experience, the projects from Techatronic.com provide endless ideas, detailed guides, and practical skills. Bookmark these links, experiment, and build real-world applications!
