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Build a working traffic light system using the Arduino Uno R4, a 4-digit 7-segment display (TM1637), and an 8 LED NeoPixel ring. The LEDs change from Red → Green → Yellow, and a countdown timer appears on the display. Wiring / Pin Connections Traffic Light Module: Red LED D5 Yellow LED D6 Green LED D7 GND GND 4-Digit Display (TM1637): Vcc 3 ...
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Jump to key moments of Tutorial Arduino Uno R4 LED Code

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