This is a simple Arduino project for beginners with excellent visual effect, but also a very useful tool for learning to play a musical instrument.
Devices and components
Arduino-Nano
0.91 Inch Blue OLED LCD Display 128x32 IIC I2C Oled Module SSD1306 Driver IC DC 3.3V 5V for Arduino PIC
Resistance 470 ohms
3mm LED
10kOhm potentiometer
Piezoelectric buzzer
Materials and tools
Soldering kit
Software and tools
Arduino IDE
Project description
Metronome code
1/*
2
3 For Loop Iteration
4
5 Demonstrates the use of a for() loop.
6
7 Lights multiple LEDs in sequence, then in reverse.
8
9 The circuit:
10
11 - LEDs from pins 2 through 7 to ground
12
13 created 2006
14
15 by David A. Mellis
16
17 modified 30 Aug 2011
18
19 by Tom Igoe
20
21 This example code is in the public domain.
22
23 https://www.arduino.cc/built-in-examples/ForLoopIteration
24
25*/
26#include <SPI.h>
27#include <Wire.h>
28#include <Adafruit_GFX.h>
29#include <Adafruit_SSD1306.h>
30#define SCREEN_WIDTH 128 // OLED display width, in pixels
31#define SCREEN_HEIGHT 64 // OLED display height, in pixels
32#define OLED_RESET -1
33#define SCREEN_ADDRESS 0x3C
34Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
35int timer = 0; // The higher the number, the slower the timing.
36int bpm = 0;
37const unsigned char zmaj [] PROGMEM = {
38 // 'zmaj7 60x60, 128x64px
39 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
40 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
41 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
42 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
43 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
44 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
45 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
46 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
47 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
48 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff,
49 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x80, 0x00, 0xbf, 0xff, 0xff, 0xff, 0xff, 0xff,
50 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfd, 0x00, 0x00, 0x5f, 0xff, 0xff, 0xff, 0xff, 0xff,
51 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x04, 0x00, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
52 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x0c, 0x00, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
53 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x00, 0x00, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
54 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x00, 0x00, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
55 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x00, 0x00, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
56 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x80, 0x00, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
57 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x40, 0x00, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
58 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x80, 0x60, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
59 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x80, 0x30, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
60 0xff, 0xff, 0xff, 0xff, 0xff, 0xe2, 0x3f, 0xfa, 0x80, 0x0f, 0xcf, 0xff, 0xff, 0xff, 0xff, 0xff,
61 0xff, 0xff, 0xff, 0xff, 0xff, 0xed, 0xbf, 0xf4, 0x80, 0x00, 0x2f, 0xff, 0xff, 0xff, 0xff, 0xff,
62 0xff, 0xff, 0xff, 0xff, 0xff, 0xd9, 0x3f, 0xe9, 0x80, 0x00, 0x5f, 0xff, 0xff, 0xff, 0xff, 0xff,
63 0xff, 0xff, 0xff, 0xff, 0xff, 0xa2, 0xff, 0xd3, 0x00, 0xff, 0xbf, 0xff, 0xff, 0xff, 0xff, 0xff,
64 0xff, 0xff, 0xff, 0xff, 0xff, 0x85, 0xff, 0xa6, 0x01, 0x00, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff,
65 0xff, 0xff, 0xff, 0xff, 0xff, 0x85, 0xff, 0x4c, 0x02, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
66 0xff, 0xff, 0xff, 0xff, 0xff, 0x85, 0xfe, 0x98, 0x03, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
67 0xff, 0xff, 0xff, 0xff, 0xff, 0x85, 0xfd, 0x30, 0x02, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
68 0xff, 0xff, 0xff, 0xff, 0xff, 0x82, 0x02, 0x60, 0x02, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
69 0xff, 0xff, 0xff, 0xff, 0xff, 0xa1, 0xfc, 0x80, 0x01, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
70 0xff, 0xff, 0xff, 0xff, 0xff, 0xd0, 0x41, 0x80, 0x00, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
71 0xff, 0xff, 0xff, 0xff, 0xff, 0xe8, 0xbe, 0x00, 0x04, 0x0b, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
72 0xff, 0xff, 0xff, 0xff, 0xff, 0xf4, 0x40, 0x00, 0x0b, 0xc3, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
73 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x00, 0x00, 0x05, 0x23, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
74 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x00, 0x00, 0x47, 0xcf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
75 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x00, 0x00, 0x87, 0x8f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
76 0xff, 0xff, 0xff, 0xff, 0xff, 0xfd, 0x00, 0x00, 0x8b, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
77 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0x80, 0x00, 0x97, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
78 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x4c, 0x01, 0xaf, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
79 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xa6, 0x03, 0x5f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
80 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xd3, 0x04, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
81 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xe9, 0x8c, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
82 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf4, 0x88, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
83 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x90, 0x53, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
84 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x90, 0x3d, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
85 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x8a, 0x05, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
86 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf8, 0x87, 0x02, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
87 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfa, 0x01, 0xff, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
88 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf9, 0x00, 0x81, 0x7f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
89 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfc, 0xff, 0x9f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
90 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xfe, 0x00, 0x5f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
91 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
92 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
93 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
94 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
95 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
96 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
97 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
98 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
99 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
100 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
101 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
102 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
103};
104void setup() {
105Serial.begin(9600);
106 // use a for loop to initialize each pin as an output:
107 display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS);
108 display.clearDisplay();
109 display.drawBitmap(0, 0,zmaj, 128, 64, WHITE); // display.drawBitmap(x position, y position, bitmap data, bitmap width, bitmap height, color)
110 display.display();
111 delay(2000);
112 display.clearDisplay();
113 display.setTextSize(2);
114 display.setTextColor(WHITE);
115 display.setCursor(22,10);
116 display.println("mircemk");// Print text
117 display.setCursor(10,40);
118 display.println("METRONOME");
119 display.display();
120 delay(2000);
121
122 for (int thisPin = 2; thisPin < 10; thisPin++) {
123
124 pinMode(thisPin, OUTPUT);
125
126 }
127}
128
129void loop() {
130
131 int sensorValue = analogRead(A0);
132 byte timer = map(sensorValue, 0, 1023, 20,125);
133
134 bpm=map(timer, 20 ,125 , 160 , 60);
135 Serial.println(bpm);
136
137 display.clearDisplay();
138 display.setTextSize(3);
139 display.setTextColor(WHITE);
140 display.setCursor(35,5);
141 display.println("BPM:");
142 display.setCursor(15,40);
143 display.println(bpm);
144 display.setTextSize(2);
145 display.setCursor(73,45);
146 display.println("/min");
147
148 display.display();
149
150 // loop from the lowest pin to the highest:
151
152 for (int thisPin = 2; thisPin < 10; thisPin++) {
153
154 // turn the pin on:
155
156 digitalWrite(thisPin, HIGH);
157
158 delay(timer);
159
160 // turn the pin off:
161
162 digitalWrite(thisPin, LOW);
163
164 }
165
166 // loop from the highest pin to the lowest:
167
168 for (int thisPin = 9; thisPin >= 2; thisPin--) {
169
170 // turn the pin on:
171
172 digitalWrite(thisPin, HIGH);
173
174 delay(timer);
175
176 // turn the pin off:
177
178 digitalWrite(thisPin, LOW);
179
180 }
181}
Documentation
Schematic
Diagram.jpg
Note: Content and images are from: https://projecthub.arduino.cc/, with some modifications.
If you want it removed due to copyright reasons, please leave a comment. Thank you.
I want to share this article more widely so that everyone knows about Arduino and your project.