Pomodoro Timer

IpsumCapra — Fri, 02 Oct 2026 13:12:49 +0000

This is a submission for the Hacktoberfest Weekend Challenge: Build for a Friend

What I Built

A friend of mine sometimes has trouble concentrating on their studies, so I made them a simple Pomodoro Timer using Python.

Demo

Copy the code to a file named main.py. Feel free to use a venv. After you have done that, run the two commands below. You only have to install the PyQt6 package once.

pip install PyQt6
python main.py

Code

import sys
from PyQt6.QtCore import QSize, QTimer
from PyQt6.QtWidgets import QApplication, QHBoxLayout, QLCDNumber, QMainWindow, QPushButton, QVBoxLayout, QWidget

# Window setup
app = QApplication(sys.argv)

window = QMainWindow()
window.setWindowTitle("Pomodoro Timer")
window.setFixedSize(QSize(420, 220))

layout = QVBoxLayout()

central_widget = QWidget()
central_widget.setLayout(layout)
window.setCentralWidget(central_widget)

# LCD
lcd = QLCDNumber()
lcd.setDigitCount(8)
lcd.setFixedSize(QSize(400, 150))
lcd.display("00:45:00")
lcd.setSegmentStyle(QLCDNumber.SegmentStyle.Filled)

layout.addWidget(lcd)

# Buttons
buttons = QWidget()
button_layout = QHBoxLayout()

toggle_button = QPushButton("Start/Stop")
reset_button = QPushButton("Reset")

button_layout.addWidget(toggle_button)
button_layout.addWidget(reset_button)
buttons.setLayout(button_layout)

layout.addWidget(buttons)

# Timer logic and connections
time_remaining = 45 * 60
filled = True

def update_time():
    global time_remaining, filled
    if time_remaining > 0:
        time_remaining = time_remaining - 1

        seconds = time_remaining

        (hours, seconds) = divmod(seconds, 3600)
        (minutes, seconds) = divmod(seconds, 60)

        lcd.display(f"{hours:02.0f}:{minutes:02.0f}:{seconds:02.0f}")
    else:
        filled = not filled
        lcd.setSegmentStyle(QLCDNumber.SegmentStyle.Filled if filled else QLCDNumber.SegmentStyle.Outline)

def reset_timer():
    global time_remaining
    update_timer.stop()
    time_remaining = 45 * 60 + 1
    filled = True
    lcd.setSegmentStyle(QLCDNumber.SegmentStyle.Filled)
    update_time()

update_timer = QTimer()
update_timer.timeout.connect(update_time)
toggle_button.pressed.connect(lambda: update_timer.stop() if update_timer.isActive() else update_timer.start(1000))
reset_button.pressed.connect(reset_timer)

# Run the app
window.show()
app.exec()

How I Built It

By hand. No AI was used. 100% Human made.

Why Does Open Innovation Matter?

Open source libraries are what makes these applications possible. Better yet, the language used to create the application, Python, is open source itself. These libraries, language features and transparency would not be possible with closed source.
The world can, however, go without 'open' AI tools. I would like to inspire people to get out there and actually build the relevant skills to achieve their goals. AI does not replace skill.

My Agent Session

No AI was used for this submission. 100% Human made.