FearLess Breath – Guided Breathing Device

FearLess Breath is a simple Arduino-based guided breathing device.

In daily life, people often experience stress and anxiety before important events such as exams, competitions, or presentations. These situations can lead to rapid breathing and reduced concentration.

This project helps users regulate their breathing by following a structured cycle: inhale, hold, and exhale. A 16×2 LCD screen displays instructions and timing information, allowing users to follow the rhythm easily.

Although the system is simple, it demonstrates how basic electronics can be used to support relaxation and focus.

Arduino Nano × 1

LCD1602 display × 1

Push button × 1

Breadboard × 1

Jumper wires

USB cable × 1

Resistor or potentiometer × 1

Computer with Arduino IDE

The system provides the following functions:

1. Guided breathing cycle: Inhale → Hold → Exhale

2. Three breathing modes:

- Calm Mode

- Focus Mode

- Adrenaline Mode

3. LCD display showing breathing phase and countdown

4. Single-button control system

The device allows users to switch modes and start or stop the breathing session easily.

The system works based on a repeating breathing cycle:

Inhale → Hold → Exhale

The Arduino controls the timing of each phase and updates the LCD display accordingly.

The LCD screen provides two types of feedback:

- First row: current breathing phase and remaining time

- Second row: a visual progress bar

This allows the user to follow the breathing rhythm without counting manually.

The LCD is connected in 4-bit mode.

LCD connections:

RS → D7

E → D6

D4 → D5

D5 → D4

D6 → D3

D7 → D2

Power connections:

VSS → GND

VDD → 5V

A → 5V

K → GND

Button connection:

One side → Arduino D8

Other side → GND

The internal pull-up resistor is used.

The system includes three breathing modes:

- Calm Mode

- Focus Mode

- Adrenaline Mode

Timing parameters:

Calm Mode:

Inhale: 4 seconds

Hold: 4 seconds

Exhale: 6 seconds

Focus Mode:

Inhale: 4 seconds

Hold: 2 seconds

Exhale: 4 seconds

Adrenaline Mode:

Inhale: 2 seconds

Hold: 1 second

Exhale: 2 seconds

The program includes the following main parts:

1. Initialization of LCD

2. Button input detection

3. Mode switching

4. Breathing cycle execution:

- inhale()

- hold()

- exhale()

The system continuously runs the breathing cycle when activated.

After assembling the circuit and uploading the program, the system works correctly.

Results show that:

- The LCD displays the breathing phases correctly

- The progress bar updates dynamically

- The button successfully controls mode switching

- All three breathing modes function properly

The device can effectively guide users through controlled breathing.

This project successfully implements a simple guided breathing device using Arduino.

Through this project, we learned:

- Basic Arduino programming

- LCD display control

- Button input handling

- Embedded system logic design

Although the system is simple, it demonstrates a practical application of electronics in stress management.

Future improvements may include:

- Adding a portable battery

- Designing a compact enclosure

- Improving user interaction