Arduino Quiz Buzzer for 3 Players (4 Buttons + 3 LEDs + Buzzer)

Who buzzed first? The Arduino decides down to the millisecond! The **first to buzz answers** system from TV quiz shows, for **3 players** and a **host button**. The fastest player's **LED** lights up bright with its own sound, and the other buttons lock. Buzzing before the host says ready is a **foul**. Hold the host button for 1 s and the **scoreboard** plays on the LEDs. Ready for real use in class or at home.