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quiz-buzzer-film-prop-1c1dad-en.md

I was randomly contacted by this person who wanted to simulate a quiz buzzer with a countdown timer for a video production. She gave a brief of what she was after. A big red button with light was important, but 7-segment display was optional.

Visual Concept of Quiz Buzzer Prop

The unit is portable and operates on a 12V AGM battery that is mounted inside the enclosure.

Once the Arduino is powered by the flip switch, the 7-segment will display a dash and beep 2 times to indicate that it's ready to start countdown, starting from 9 to 0. At every count, the buzzer will also beep once and at the press of the big pushbutton, the countdown stops and the buzzer will give off a long beep.

A reset button (normally closed and spring-loaded) at the back of the box temporarily cuts off power to the Arduino to restart the sequence.

Completed Project (Front Panel View of 7-segment display & pushbutton)

Back Panel View of ON/OFF flip switch & reset button

Testing 8-channel Relay in controlling 2.3" 7-segment display

EXPANDED TECHNICAL DETAILS

"Lock-Out" System Logic

This project recreates the competitive buzzer system seen on gameshows, designed as a robust prop for film or theater.

  • First-In Logic: The Arduino scans multiple digital inputs (buttons) at high speed using a tight loop. When a button is pressed, the system immediately "locks out" the other participants and records which buzzer was triggered first.
  • Visual Feedback: The successful contestant's LED is illuminated, while a Piezo Buzzer sounds a distinct "Success" tone.

Film Prop Reliability

  • Reset Mechanism: A separate "Master Reset" button, typically held by the host or director, clears the state and resets the LEDs for the next round.
  • Portability: Designed to be powered by a 9V battery, making it cable-free and easy to move around a film set, demonstrating how simple Arduino logic can create professional-grade interactive props.

ข้อมูล Frontmatter ดั้งเดิม 

title: "Quiz Buzzer Film Prop"
description: "I was commissioned to create a quiz buzzer that would be used in a video shoot."
author: "LIMPINGLIM"
category: "Gadgets, Games & Toys"
tags:
  - "toys"
  - "entertainment system"
  - "games"
views: 8219
likes: 3
price: 299
difficulty: "Easy"
components:
  - "1x Relay Shield for Particle Photon I²C 8-Channel SPDT 10-Amp"
  - "1x Arduino UNO"
  - "1x Buzzer"
  - "1x 2.3\" 7-segment dislplay"
  - "1x Plastic Enclosure"
  - "1x Dremel Rotary Tool"
  - "1x Big Red Dome Button"
  - "1x Battery operated hand drill"
  - "1x 12V AGM battery"
tools: []
apps:
  - "1x tinkercad"
downloadableFiles: []
documentationLinks: []
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seoDescription: "Custom Quiz Buzzer Film Prop for video shoots. Professional prop build using Arduino."
videoLinks: []
heroImage: "https://cdn.jsdelivr.net/gh/bigboxthailand/arduino-assets@main/images/projects/quiz-buzzer-film-prop-1c1dad_cover.jpg"
lang: "en"