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arduino-tick-tock-metronome-a49188.md

I once came across an old, broken metronome and thought it could be a simple breadboard project. I initially started with just a buzzer and a potentiometer, but then decided to add more features, including a Tick-Tock function for 4/4 time, an LCD display, and an LED to blink along with the beat.

By turning the first potentiometer, you can adjust the BPM of the beat.

By turning the second potentiometer, you can adjust the LCD contrast.

🛠️ เจาะลึกเบื้องหลังการทำงาน (Deep Dive / Technical Analysis)

For musicians, holding a steady beat is crucial. The Tick-Tock Metronome project uses the precise internal clock of the Arduino to create a steady, adjustable click-track accompanied by a sweeping row of LEDs.

Calculating BPM

The core math of this project revolves around Beats Per Minute (BPM).

  • If you want a tempo of 120 BPM, that equals 2 beats per second.
  • The Arduino must trigger a click exactly every 500 milliseconds.
  • A potentiometer allows the user to adjust the BPM (e.g., mapped from 60 to 200 BPM). The Arduino instantly recalculates the delay between clicks.

Hardware Components

  • Arduino Uno/Nano: The timing core.
  • Potentiometer: To adjust the tempo dial.
  • Piezo Buzzer or Mini Speaker: To produce the sharp "tick" and "tock" sounds.
  • LEDs (x5 or x7): Arranged in a row, they light up back and forth like a mechanical pendulum sweeping across the metronome face.

The "Sweep" Effect

By using an array of LED pins, you can write a for loop that sequences the LEDs left-to-right on the "Tick", and right-to-left on the "Tock," giving a highly satisfying visual representation of the rhythm.

ข้อมูล Frontmatter ดั้งเดิม 

title: "Arduino Tick-Tock Metronome"
description: "A simple breadboard project to get familiar with the buzzer and LCD display."
author: "petbump10"
category: "Audio & Sound"
tags:
  - "Audio"
  - "Music"
views: 6173
likes: 6
price: 1120
difficulty: "Easy"
components:
  - "2x Resistor 220 ohm"
  - "1x Computer"
  - "1x Piezo Buzzer"
  - "1x 3mm LEDS (chose color)"
  - "1x Arduino UNO R3 - Made in italy"
  - "1x 10 jumper wires 150mm male"
  - "2x 10kOhm potentiometer"
  - "1x 400 points solderless breadboard"
  - "1x 16x2 LCD"
tools: []
apps:
  - "1x Arduino IDE 2.0 (beta)"
downloadableFiles:
  - "https://projects.arduinocontent.cc/bf6e47d2-7744-4f09-ba5f-40c5040159fe.ino"
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seoDescription: "Build a simple Arduino Tick-Tock Metronome on a breadboard to learn buzzer and LCD display basics."
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