Reddit
reddit.com › r/esp32 › esp32-2424s012 countdown stopwatch project
r/esp32 on Reddit: ESP32-2424S012 countdown stopwatch project
February 10, 2025 -
Here is my latest project it is a minimal countdown timer. The time is set by swiping (it's a bit glitchy) a tap to start the timer. Screen flashes red once halfway through the countdown and flashed 3 times at the end. After 60 seconds of inactivity on the "home screen" it turns off and can be turned on by pressing the "key button" which is linked to the battery. I have posted my code in the comments, any opinions on how I might improve the code or features i could add or anything are greatfully accepted.
GitHub
github.com › thexman › CountdownTimer
GitHub - thexman/CountdownTimer: ESP32 Countdown timer that controls an relay · GitHub
ESP32 Countdown timer that controls an relay. Contribute to thexman/CountdownTimer development by creating an account on GitHub.
Author thexman
Videos
Instructables
instructables.com › circuits › arduino
ESP32 WiFi New Year Countdown Timer : 20 Steps - Instructables
January 2, 2026 - ESP32 WiFi New Year Countdown Timer: In this project, we will build a WiFi-synchronized New Year countdown timer using an ESP32, a 16×2 LCD, a buzzer, and the ESP32’s built-in LED. Unlike many clocks or countdown timers, this project does NOT need a real-time clock (RTC) module. Instea…
ESP32 Forum
esp32.com › viewtopic.php
countdown timer using interrupts - ESP32 Forum
September 26, 2022 - - timer counting down: timer starts at 1000000 microseconds and when it reaches the alarm value (0 microseconds) the interrupt is triggered. So in your example you start the countdown timer at 10000 microseconds and wait for it to reach the alarm time of (1000000 microseconds).
YouTube
youtube.com › watch
ESP32 Countdown Timer Build (Full Wiring + Code Explained) | OLED + Buzzer Project - YouTube
In this full step-by-step tutorial, I show you exactly how to build and program a dynamic countdown timer using an ESP32, OLED display, and buzzer.This proje...
Published February 17, 2026
Espressif
docs.espressif.com › projects › esp-idf › en › v4.3 › esp32 › api-reference › peripherals › timer.html
General Purpose Timer - ESP32 - — ESP-IDF Programming Guide v4.3 documentation
Once the timer is enabled, its counter starts running. To enable the timer, call the function timer_init() with counter_en set to true, or call timer_start(). You can specify the timer’s initial counter value by calling timer_set_counter_value().
DigiKey
digikey.com › en › maker › projects › esp32-c3-lcd-kit-rgb-led-countdown-timer-using-visual-programming › 1a135e50d88c426fa7ab43ba8f018e77
ESP32-C3 LCD Kit – RGB LED Countdown Timer Using Visual Programming
In this Visuino project, you will learn how to use the ESP32-C3 LCD Kit to create a colorful Countdown Timer using a rotary encoder, an LCD, and an RGB LED. Turn the encoder to set the countdown duration, press the button to start the timer, ...
YouTube
youtube.com › watch
Build a 60-Second Countdown Timer with ESP32 - YouTube
"Ready for a super fun tech project? In this video, we’re making a countdown timer with an ESP32 and a 4-digit display—all in Wokwi, no hardware needed! It s...
Published February 22, 2025
Arduino
projecthub.arduino.cc › t0talstorm › dual-display-pomodoro-timer-using-esp-32-abc6ae
Dual Display Pomodoro Timer Using ESP 32 | Arduino Project Hub
This is a dual-display Pomodoro timer using an ESP32, combining a 16x2 LCD and a 0.96” OLED both running on the same I2C bus. The OLED shows the countdown, while the LCD displays whether you're in study or break mode.
Hackster
hackster.io › news › never-miss-a-holiday-with-this-5-esp32-countdown-timer-d9ff6a81e431
Never Miss a Holiday with This $5 ESP32 Countdown Timer - Hackster.io
March 17, 2026 - The hardware design is simple: a sub-$5 Cheap Yellow Display (CYD) was installed in a 3D-printed case with a stand. The CYD comes equipped with an ESP32 microcontroller, so it contains everything the project needs.
Visuino
visuino.com › home › intermediate › espnow countdown timer atom matrix & lite esp32 m5stack
ESPNOW Countdown Timer ATOM Matrix & Lite ESP32 M5Stack - Visuino - Visual Development for Arduino
February 2, 2025 - ESP32-C3 LCD Kit – RGB LED Countdown Timer Using Visual Programming November 1, 2025
GitHub
github.com › mobizt › ESP32-Time-Helper › blob › master › examples › Countdown › Countdown.ino
ESP32-Time-Helper/examples/Countdown/Countdown.ino at master · mobizt/ESP32-Time-Helper
Serial.print("One time countdown until 18/12/2019 8:30:45 is ");
Author mobizt
Visuino
visuino.com › home › intermediate › esp32-c3 lcd kit – rgb led countdown timer using visual programming
ESP32-C3 LCD Kit – RGB LED Countdown Timer Using Visual Programming - Visuino - Visual Development for Arduino
November 1, 2025 - In this Visuino project, you will learn how to use the ESP32-C3 LCD Kit to create a colorful Countdown Timer using a rotary encoder, an LCD display, and an RGB LED. Turn the encoder to set the countdown duration, press the button to start the timer, and watch the countdown update live on the ...
Random Nerd Tutorials
randomnerdtutorials.com › home › project › esp32 › esp32/esp8266 web server: control outputs with timer
ESP32/ESP8266 Web Server: Control Outputs with Timer | Random Nerd Tutorials
March 17, 2025 - The ESP32/ESP8266 hosts a web server that allows you to control an output with a pulse; The web server contains a slider that allows you to define the pulse width (how many seconds the output should be HIGH); There’s an ON/OFF button. Set it to ON to send the pulse. After that, you’ll see a timer decreasing for the duration of the pulse width;
GitHub
github.com › andyrbarrow › YachtRaceTimer
GitHub - andyrbarrow/YachtRaceTimer: A yacht race countdown timer for ESP32 using the Arduino IDE · GitHub
A yacht race countdown timer for ESP32 using the Arduino IDE - andyrbarrow/YachtRaceTimer
Author andyrbarrow
CircuitDigest
circuitdigest.com › microcontroller-projects › esp32-timers-and-timer-interrupts
ESP32 Timers & Timer Interrupt Tutorial
August 5, 2025 - Timer interrupts are crucial in the use of ESP32 timer interrupt programming projects for accurate timing control. If you want something to occur on schedule, ESP32 timer interrupts give you the accuracy required. A timer interrupt is a dedicated interrupt that operates as a high-precision clock, counting and controlling time events with microsecond precision.
Hackster.io
hackster.io › ronfrtek › espnow-countdown-timer-atom-matrix-lite-esp32-m5stack-0a7724
ESPNOW Countdown Timer ATOM Matrix & Lite ESP32 M5Stack - Hackster.io
November 18, 2024 - We are going to use ATOM Matrix & Atom Lite, both are ESP32 boards from M5Stack to make a Countdown timer.
Hackster.io
hackster.io › ronfrtek › countdown-timer-using-atom-matrix-esp32-96b42d
Countdown Timer Using ATOM Matrix ESP32 - Hackster.io
April 3, 2023 - If you power the ATOM Matrix module and push the Matrix button The Display will start to flash the Green Color and Countdown 10 seconds, once it is finished a Red color will flash, if you press the Matrix button again it will repeat the Countdown
GitHub
github.com › Imogen-Wren-Studios › esp32-countdown-clock
GitHub - low-poly-studio/esp32-countdown-clock: ESP32 & WS2812B Countdown Clock, with web server & GUI interface. · GitHub
ESP32 & WS2812B Countdown Clock, with web server & GUI interface. - low-poly-studio/esp32-countdown-clock
Author low-poly-studio