Keyless Musical Instrument

Dive into my latest project where I've created a unique and innovative keyless musical instrument.

Oct 24, 2023

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GPL3+

Components and supplies

Arduino Uno Rev3

PAM8403 amplifier module

Speaker 3W 4 ohms

LDR module

Laser Diode Red 650nm 5mW

KY-040 Rotary Encoder

16x2 LCD display with I²C interface

Tools and machines

jig saw

Drilling Machine

Soldering kit

Apps and platforms

Arduino IDE 1.8

Project description

Code

keyless musical instrument code

1//FOR LCD
2#include <LiquidCrystal_I2C.h>
3LiquidCrystal_I2C lcd(0x27,16,2);
4
5 //FOR ROTARY ENCODER
6 #define inputCLK 3
7 #define inputDT 4
8 int counter = 0; 
9 int currentStateCLK;
10 int previousStateCLK; 
11
12void setup() {
13  Serial.begin(9600);
14  //FOR LCD
15  lcd.init();
16  lcd.clear();
17  lcd.backlight();
18  lcd.setCursor(1,0);
19  lcd.print("KEYLESS MUSIC");
20  lcd.setCursor(3,1);
21  lcd.print("INSTRUMENT");
22  delay(1000);
23  lcd.clear();
24    lcd.setCursor(4,0);
25  lcd.print("MADE BY");
26    lcd.setCursor(5,1);
27  lcd.print("ASBRO");
28  delay(2000);
29  lcd.clear();
30  lcd.setCursor(1,0);
31  lcd.print("MUSIC NOTE:");
32  //LDR 
33  pinMode(13, INPUT);
34  pinMode(12, INPUT);
35  pinMode(11, INPUT);
36  pinMode(10, INPUT);
37  pinMode(9, INPUT);
38  pinMode(8, INPUT);
39  pinMode(7, INPUT);
40  pinMode(6, INPUT);
41  //BUZZER
42  pinMode(5, OUTPUT); 
43  //ROTARY ENCODER
44  pinMode (inputCLK,INPUT);
45  pinMode (inputDT,INPUT);
46  previousStateCLK = digitalRead(inputCLK);
47
48}
49
50void loop() {
51    
52
53    currentStateCLK = digitalRead(inputCLK);   
54   if (currentStateCLK != previousStateCLK){      
55
56     if (digitalRead(inputDT) != currentStateCLK) 
57       counter --;
58    else
59       counter ++;      
60   
61     if(counter==0){
62       lcd.setCursor(3,1);
63       lcd.print("OCTAVE 4"); 
64     }
65     else if(counter==1){
66        lcd.setCursor(3,1);
67        lcd.print("OCTAVE 5");
68     }
69     else if(counter==2){
70        lcd.setCursor(3,1);
71        lcd.print("OCTAVE 6");
72     }
73     else if(counter==3){
74        lcd.setCursor(3,1);
75        lcd.print("OCTAVE 7");
76     }
77     else if(counter==-1){
78        lcd.setCursor(3,1);
79        lcd.print("OCTAVE 3");
80     }
81     else if(counter<=-2){
82        lcd.setCursor(3,1);
83        lcd.print("         ");
84     }
85     else if(counter>=4){
86        lcd.setCursor(3,1);
87        lcd.print("         ");
88     }
89
90     Serial.print(" -- Value: ");
91     Serial.println(counter);
92   } 
93   previousStateCLK = currentStateCLK; 
94 
95
96 
97  while(digitalRead(13)==HIGH){
98    if(counter==0){
99    lcd.setCursor(13,0);
100    lcd.print("C4");
101    tone(5,262);
102   } 
103   else if(counter==1) {
104    lcd.setCursor(13,0);
105    lcd.print("C5");
106    tone(5,523);
107   }
108   else if(counter==2) {
109    lcd.setCursor(13,0);
110    lcd.print("C6");
111    tone(5,1046);
112   }
113   else if(counter==3) {
114    lcd.setCursor(13,0);
115    lcd.print("C7");
116    tone(5,2093);
117   }
118   else if(counter==-1) {
119    lcd.setCursor(13,0);
120    lcd.print("C3");
121    tone(5,131);
122   }
123  }
124  while(digitalRead(7) == HIGH) {
125   if(counter==0) {
126    lcd.setCursor(13,0);
127    lcd.print("D4");
128    tone(5,294);
129   } 
130   else if(counter==1) {
131    lcd.setCursor(13,0);
132    lcd.print("D5");
133    tone(5,587);
134   }
135   else if(counter==2) {
136    lcd.setCursor(13,0);
137    lcd.print("D6");
138    tone(5,1175);
139   }
140   else if(counter==3) {
141    lcd.setCursor(13,0);
142    lcd.print("D7");
143    tone(5,2349);
144   }
145   else if(counter==-1) {
146    lcd.setCursor(13,0);
147    lcd.print("D3");
148    tone(5,147);
149   } 
150  }
151  while(digitalRead(8) == HIGH) {
152   if(counter==0) {
153    lcd.setCursor(13,0);
154    lcd.print("E4");
155    tone(5,330);
156   } 
157   else if(counter==1) {
158    lcd.setCursor(13,0);
159    lcd.print("E5");
160    tone(5,659);
161   }
162   else if(counter==2) {
163    lcd.setCursor(13,0);
164    lcd.print("E6");
165    tone(5,1318);
166   }
167   else if(counter==3) {
168    lcd.setCursor(13,0);
169    lcd.print("E7");
170    tone(5,2637);
171   }
172   else if(counter==-1) {
173    lcd.setCursor(13,0);
174    lcd.print("E3");
175    tone(5,165);
176   } 
177  }
178  while(digitalRead(9) == HIGH) {
179    if(counter==0) {
180    lcd.setCursor(13,0);
181    lcd.print("F4");
182    tone(5,349);
183   } 
184   else if(counter==1) {
185    lcd.setCursor(13,0);
186    lcd.print("F5");
187    tone(5,698);
188   }
189   else if(counter==2) {
190    lcd.setCursor(13,0);
191    lcd.print("F6");
192    tone(5,1397);
193   }
194   else if(counter==3) {
195    lcd.setCursor(13,0);
196    lcd.print("F7");
197    tone(5,2793);
198   }
199   else if(counter==-1) {
200    lcd.setCursor(13,0);
201    lcd.print("F3");
202    tone(5,175);
203   } 
204  }
205  while(digitalRead(10) == HIGH) {
206    if(counter==0) {
207    lcd.setCursor(13,0);
208    lcd.print("G4");
209    tone(5,392);
210   } 
211   else if(counter==1) {
212    lcd.setCursor(13,0);
213    lcd.print("G5");
214    tone(5,784);
215   }
216   else if(counter==2) {
217    lcd.setCursor(13,0);
218    lcd.print("G6");
219    tone(5,1568);
220   }
221   else if(counter==3) {
222    lcd.setCursor(13,0);
223    lcd.print("G7");
224    tone(5,3136);
225   }
226   else if(counter==-1) {
227    lcd.setCursor(13,0);
228    lcd.print("G3");
229    tone(5,196);
230   } 
231  }
232  while(digitalRead(11) == HIGH)  {
233    if(counter==0) {
234    lcd.setCursor(13,0);
235    lcd.print("A4");
236    tone(5,440);
237   } 
238   else if(counter==1) {
239    lcd.setCursor(13,0);
240    lcd.print("A5");
241    tone(5,880);
242   }
243   else if(counter==2) {
244    lcd.setCursor(13,0);
245    lcd.print("A6");
246    tone(5,1760);
247   }
248   else if(counter==3) {
249    lcd.setCursor(13,0);
250    lcd.print("A7");
251    tone(5,3520);
252   }
253   else if(counter==-1) {
254    lcd.setCursor(13,0);
255    lcd.print("A3");
256    tone(5,220);
257   }
258  }
259  while(digitalRead(12) == HIGH)  {
260    if(counter==0) {
261    lcd.setCursor(13,0);
262    lcd.print("B4");
263    tone(5,494);
264   } 
265   else if(counter==1) {
266    lcd.setCursor(13,0);
267    lcd.print("B5");
268    tone(5,988);
269   }
270   else if(counter==2) {
271    lcd.setCursor(13,0);
272    lcd.print("B6");
273    tone(5,1975);
274   }
275   else if(counter==3) {
276    lcd.setCursor(13,0);
277    lcd.print("B7");
278    tone(5,3951);
279   }
280   else if(counter==-1) {
281    lcd.setCursor(13,0);
282    lcd.print("B3");
283    tone(5,247);
284   }
285  }  
286  while(digitalRead(6) == HIGH)  {
287    if(counter==0) {
288    lcd.setCursor(13,0);
289    lcd.print("C5");
290    tone(5,523);
291   } 
292   else if(counter==1) {
293    lcd.setCursor(13,0);
294    lcd.print("C6");
295    tone(5,1046);
296   }
297   else if(counter==2) {
298    lcd.setCursor(13,0);
299    lcd.print("C7");
300    tone(5,2093);
301   }
302   else if(counter==3) {
303    lcd.setCursor(13,0);
304    lcd.print("C8");
305    tone(5,4186);
306   }
307   else if(counter==-1) {
308    lcd.setCursor(13,0);
309    lcd.print("C4");
310    tone(5,262);
311   }
312  }
313  noTone(5);
314
315}

//FOR LCD
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);

 //FOR ROTARY ENCODER
 #define inputCLK 3
 #define inputDT 4
 int counter = 0; 
 int currentStateCLK;
 int previousStateCLK; 

void setup() {
  Serial.begin(9600);
  //FOR LCD
  lcd.init();
  lcd.clear();
  lcd.backlight();
  lcd.setCursor(1,0);
  lcd.print("KEYLESS MUSIC");
  lcd.setCursor(3,1);
  lcd.print("INSTRUMENT");
  delay(1000);
  lcd.clear();
    lcd.setCursor(4,0);
  lcd.print("MADE BY");
    lcd.setCursor(5,1);
  lcd.print("ASBRO");
  delay(2000);
  lcd.clear();
  lcd.setCursor(1,0);
  lcd.print("MUSIC NOTE:");
  //LDR 
  pinMode(13, INPUT);
  pinMode(12, INPUT);
  pinMode(11, INPUT);
  pinMode(10, INPUT);
  pinMode(9, INPUT);
  pinMode(8, INPUT);
  pinMode(7, INPUT);
  pinMode(6, INPUT);
  //BUZZER
  pinMode(5, OUTPUT); 
  //ROTARY ENCODER
  pinMode (inputCLK,INPUT);
  pinMode (inputDT,INPUT);
  previousStateCLK = digitalRead(inputCLK);

}

void loop() {
    

    currentStateCLK = digitalRead(inputCLK);   
   if (currentStateCLK != previousStateCLK){      

     if (digitalRead(inputDT) != currentStateCLK) 
       counter --;
    else
       counter ++;      
   
     if(counter==0){
       lcd.setCursor(3,1);
       lcd.print("OCTAVE 4"); 
     }
     else if(counter==1){
        lcd.setCursor(3,1);
        lcd.print("OCTAVE 5");
     }
     else if(counter==2){
        lcd.setCursor(3,1);
        lcd.print("OCTAVE 6");
     }
     else if(counter==3){
        lcd.setCursor(3,1);
        lcd.print("OCTAVE 7");
     }
     else if(counter==-1){
        lcd.setCursor(3,1);
        lcd.print("OCTAVE 3");
     }
     else if(counter<=-2){
        lcd.setCursor(3,1);
        lcd.print("         ");
     }
     else if(counter>=4){
        lcd.setCursor(3,1);
        lcd.print("         ");
     }

     Serial.print(" -- Value: ");
     Serial.println(counter);
   } 
   previousStateCLK = currentStateCLK; 
 

 
  while(digitalRead(13)==HIGH){
    if(counter==0){
    lcd.setCursor(13,0);
    lcd.print("C4");
    tone(5,262);
   } 
   else if(counter==1) {
    lcd.setCursor(13,0);
    lcd.print("C5");
    tone(5,523);
   }
   else if(counter==2) {
    lcd.setCursor(13,0);
    lcd.print("C6");
    tone(5,1046);
   }
   else if(counter==3) {
    lcd.setCursor(13,0);
    lcd.print("C7");
    tone(5,2093);
   }
   else if(counter==-1) {
    lcd.setCursor(13,0);
    lcd.print("C3");
    tone(5,131);
   }
  }
  while(digitalRead(7) == HIGH) {
   if(counter==0) {
    lcd.setCursor(13,0);
    lcd.print("D4");
    tone(5,294);
   } 
   else if(counter==1) {
    lcd.setCursor(13,0);
    lcd.print("D5");
    tone(5,587);
   }
   else if(counter==2) {
    lcd.setCursor(13,0);
    lcd.print("D6");
    tone(5,1175);
   }
   else if(counter==3) {
    lcd.setCursor(13,0);
    lcd.print("D7");
    tone(5,2349);
   }
   else if(counter==-1) {
    lcd.setCursor(13,0);
    lcd.print("D3");
    tone(5,147);
   } 
  }
  while(digitalRead(8) == HIGH) {
   if(counter==0) {
    lcd.setCursor(13,0);
    lcd.print("E4");
    tone(5,330);
   } 
   else if(counter==1) {
    lcd.setCursor(13,0);
    lcd.print("E5");
    tone(5,659);
   }
   else if(counter==2) {
    lcd.setCursor(13,0);
    lcd.print("E6");
    tone(5,1318);
   }
   else if(counter==3) {
    lcd.setCursor(13,0);
    lcd.print("E7");
    tone(5,2637);
   }
   else if(counter==-1) {
    lcd.setCursor(13,0);
    lcd.print("E3");
    tone(5,165);
   } 
  }
  while(digitalRead(9) == HIGH) {
    if(counter==0) {
    lcd.setCursor(13,0);
    lcd.print("F4");
    tone(5,349);
   } 
   else if(counter==1) {
    lcd.setCursor(13,0);
    lcd.print("F5");
    tone(5,698);
   }
   else if(counter==2) {
    lcd.setCursor(13,0);
    lcd.print("F6");
    tone(5,1397);
   }
   else if(counter==3) {
    lcd.setCursor(13,0);
    lcd.print("F7");
    tone(5,2793);
   }
   else if(counter==-1) {
    lcd.setCursor(13,0);
    lcd.print("F3");
    tone(5,175);
   } 
  }
  while(digitalRead(10) == HIGH) {
    if(counter==0) {
    lcd.setCursor(13,0);
    lcd.print("G4");
    tone(5,392);
   } 
   else if(counter==1) {
    lcd.setCursor(13,0);
    lcd.print("G5");
    tone(5,784);
   }
   else if(counter==2) {
    lcd.setCursor(13,0);
    lcd.print("G6");
    tone(5,1568);
   }
   else if(counter==3) {
    lcd.setCursor(13,0);
    lcd.print("G7");
    tone(5,3136);
   }
   else if(counter==-1) {
    lcd.setCursor(13,0);
    lcd.print("G3");
    tone(5,196);
   } 
  }
  while(digitalRead(11) == HIGH)  {
    if(counter==0) {
    lcd.setCursor(13,0);
    lcd.print("A4");
    tone(5,440);
   } 
   else if(counter==1) {
    lcd.setCursor(13,0);
    lcd.print("A5");
    tone(5,880);
   }
   else if(counter==2) {
    lcd.setCursor(13,0);
    lcd.print("A6");
    tone(5,1760);
   }
   else if(counter==3) {
    lcd.setCursor(13,0);
    lcd.print("A7");
    tone(5,3520);
   }
   else if(counter==-1) {
    lcd.setCursor(13,0);
    lcd.print("A3");
    tone(5,220);
   }
  }
  while(digitalRead(12) == HIGH)  {
    if(counter==0) {
    lcd.setCursor(13,0);
    lcd.print("B4");
    tone(5,494);
   } 
   else if(counter==1) {
    lcd.setCursor(13,0);
    lcd.print("B5");
    tone(5,988);
   }
   else if(counter==2) {
    lcd.setCursor(13,0);
    lcd.print("B6");
    tone(5,1975);
   }
   else if(counter==3) {
    lcd.setCursor(13,0);
    lcd.print("B7");
    tone(5,3951);
   }
   else if(counter==-1) {
    lcd.setCursor(13,0);
    lcd.print("B3");
    tone(5,247);
   }
  }  
  while(digitalRead(6) == HIGH)  {
    if(counter==0) {
    lcd.setCursor(13,0);
    lcd.print("C5");
    tone(5,523);
   } 
   else if(counter==1) {
    lcd.setCursor(13,0);
    lcd.print("C6");
    tone(5,1046);
   }
   else if(counter==2) {
    lcd.setCursor(13,0);
    lcd.print("C7");
    tone(5,2093);
   }
   else if(counter==3) {
    lcd.setCursor(13,0);
    lcd.print("C8");
    tone(5,4186);
   }
   else if(counter==-1) {
    lcd.setCursor(13,0);
    lcd.print("C4");
    tone(5,262);
   }
  }
  noTone(5);

}

Downloadable files

Circuit diagram

circuit.jpg

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