Watch This 49-Year-Old Singer Whose Bad 'AGT' Audition Turned into an 'Amazing' Golden Buzzer originally appeared on Parade. Night three of Season 20 of America’s Got Talent continued its ...

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All components are connected to the Arduino UNO via a breadboard. The MQ-2 sensor provides an analog signal to the Arduino. The buzzer and LED are controlled through digital pins, and the servo motor ...