Quiz Buzzer Lockout

On an Arduino Nano 33 BLE, run a three-team quiz buzzer: the first team to press lights its lamp, everyone else is locked out, and the quizmaster's reset opens the next round, even when a button is still held down.

Board
Nano 33 BLE · Arduino
Difficulty
Easy
Topic
Applied Integration
Access
Full plan
Solve free (Pioneer challenge)

The task

Quiz Buzzer Lockout

A pub quiz runs a buzzer round for three teams. Whoever hits their buzzer first gets to answer, and nobody else may steal the turn until the quizmaster resets the system. Teams are competitive: some keep their hand pressed on the button, hoping to win the next question the instant the round opens.

Hardware

  • Arduino Nano 33 BLE (nRF52840, 3.3 V logic). Serial console on Serial1 (D0/D1), 115200 baud. Serial is USB and is not seen by the tests.
  • Team buzzers A, B, C on D2, D3, D5; quizmaster reset button on D6. All are arcade buttons to GND with hardware debouncing: use the internal pull-ups, LOW = pressed.
  • Team lamp panel: lamp A on D4, B on D8, C on D9, HIGH = lit.

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What you get

  • Your firmware is built and run on an emulated board and checked by hardware-level tests.
  • A written walkthrough of the solution.
  • No development board or local toolchain needed.

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