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Build a 7-Segment Countdown with Arduino
I
IoTSim Editor
May 9, 2026

Build a 7-Segment Countdown with Arduino

Build a simple countdown timer with an Arduino Uno, a single-digit 7-segment display, a push button, and a buzzer. Press the button to count from 9 down to 0, then hear a short finish alert when the countdown ends.
Arduino Uno7-Segment +2