Dual Display Pomodoro Timer Using ESP 32 

push buttons

ESP 32 

5mm Red LED

10kOhm potentiometer

16x2 LCD display with I²C interface

Blue LED

5mm Green LED

40 colored male-male jumper wires

Jumper Wire Female to Male

330 ohm resistors

Arduino IDE

 0.91 Inch 128x32 IIC I2C Blue OLED LCD Display DIY Oled Module SSD1306 Driver IC DC 3.3V 5V For Arduino PIC 

<html><body>📌 What is this project about?This project is a Pomodoro timer built using an ESP32 microcontroller, designed to help improve productivity and time management. It features two separate displays:A 16x2 LCD for showing the current mode ("Study" or "Break").A 0.96” OLED display acting as a live countdown timer.Along with visual feedback, three LEDs (red, blue, green) provide intuitive progress indication during the study session, and a special blinking pattern during breaks. The device also features pause/resume and reset controls, as well as a potentiometer-based initialization where users can set their preferred focus and break durations.💡 Why did I decide to make this?As a student constantly battling with distractions and study fatigue, I wanted to build something that encourages focused work sessions and regular breaks—the very idea behind the Pomodoro Technique. I also wanted to push myself to work with the ESP32 for the first time, and explore how different hardware modules (LCD, OLED, potentiometer, buttons, LEDs) could work in harmony.This wasn’t just about a timer it became a hands-on learning journey into embedded systems, wiring, debouncing, real-time logic, and creating user-friendly experiences!⚙️ How does it work?🔄 Initialization Phase:<ol><li>When powered on, the LCD asks to set the study time using a potentiometer (0–60 mins).</li><li>Once the reset button is pressed, it proceeds to ask for break time the same way.</li><li>After the second press, the timer begins in paused state.</li></ol>🕓 Running Phase:<ol><li>The OLED counts down the time.</li><li>The LCD displays either "STUDY MODE" or "BREAK MODE".</li><li>LEDs visually show the progress:</li><li>Green + Blue + Red ON at the start</li><li>Blue + Red ON mid-way</li><li>Red ON near end</li><li>Red BLINKS continuously during break</li></ol>⏯️ Controls:<ol><li>Pressing the pause/resume button toggles the timer state.</li><li>Pressing reset at any time re-initializes the timer from scratch.</li></ol>Circuit Diagram:<figure><img src="https://projects.arduinocontent.cc/da9ab369-631a-47bb-bba7-6607aab7dc45.png"/><figcaption>Fig: Circuit Diagram</figcaption></figure><div id="gallery"><img id="gallery" src="https://projects.arduinocontent.cc/81777044-70f0-4185-9c32-3c94824b51d6.jpg"/><figcaption>Circuit Connected</figcaption>,<img id="gallery" src="https://projects.arduinocontent.cc/1f3f9c34-9afc-4dba-8508-b634cc9c5b91.jpg"/><figcaption></figcaption></div>Demo Video -<figure><iframe src="https://youtu.be/FurHVd-1RbI"></iframe></figure></body></html>

Dual Display Pomodoro Timer Using ESP 32

Circuit diagram