DIY Piano | Make Piano with Touch based keys | Touch Sensor

1//Piano With Touch Sensor Sketch
2
3#include <CapacitiveSensor.h>
4
5const  int sensitivity  = 1000; // default 30
6
7//Sa 240 Hz, Re 270 Hz, Ga 300 Hz,  Ma 320 Hz, Pa 360 Hz, Dha 400 Hz, and Ni 450 Hz, Sa 480 Hz
8int sa = 240, re =  270, ga = 300, ma = 320, pa = 360, dha = 400, ni = 450;
9int freq[] = {240,270,300,320,360,400,450,480};
10int  dly = 1000;
11
12CapacitiveSensor   cs_4_5 = CapacitiveSensor(4,5);
13CapacitiveSensor   cs_4_6 = CapacitiveSensor(4,6);
14CapacitiveSensor   cs_4_7 = CapacitiveSensor(4,7);
15CapacitiveSensor   cs_4_8 = CapacitiveSensor(4,8);        
16CapacitiveSensor   cs_4_9 = CapacitiveSensor(4,9);        
17CapacitiveSensor   cs_4_10 = CapacitiveSensor(4,10);        
18CapacitiveSensor   cs_4_11 = CapacitiveSensor(4,11);
19
20void setup()                    
21{
22   pinMode(A5, OUTPUT);
23   cs_4_8.set_CS_AutocaL_Millis(0xFFFFFFFF);     // turn  off autocalibrate on channel 1 - just as an example
24   cs_4_9.set_CS_AutocaL_Millis(0xFFFFFFFF);     // turn off autocalibrate on channel 1 - just as an example
25   cs_4_10.set_CS_AutocaL_Millis(0xFFFFFFFF);     // turn off autocalibrate on channel 1 - just as an example
26//   Serial.begin(9600);
27}
28
29void  human(){
30  
31  long total1 =  cs_4_5.capacitiveSensor(sensitivity);
32  long  total2 =  cs_4_6.capacitiveSensor(sensitivity);
33  long total3 =  cs_4_7.capacitiveSensor(sensitivity);
34  long total4 =  cs_4_8.capacitiveSensor(sensitivity);
35  long total5 =  cs_4_9.capacitiveSensor(sensitivity);
36  long total6 =  cs_4_10.capacitiveSensor(sensitivity);
37  long total7 =  cs_4_11.capacitiveSensor(sensitivity);
38  
39  int thresh = 25;
40  
41  if(total1>thresh){
42    tone(A5,freq[0]);
43  }else if(total2>thresh){
44    tone(A5,freq[1]);
45  }else if(total3>thresh){
46    tone(A5,freq[2]);
47  }else if(total4>thresh){
48    tone(A5,freq[3]);
49  }else if(total5>thresh){
50    tone(A5,freq[4]);
51  }else if(total6>thresh){
52    tone(A5,freq[5]);
53  }else if(total7>thresh){
54    tone(A5,freq[6]);
55  }else{
56    noTone(A5);
57  }
58}
59
60void robotic_hbd(){
61  int freq[]  = {
62    sa,sa,re,sa,ma,ga,
63    sa,sa,re,sa,pa,ma,
64    sa,sa,dha,pa,ma,ga,re,
65    ni,ni,dha,ma,pa,ma,
66    sa,re,sa,ma,ga,
67    sa,re,sa,pa,ma,
68    sa,dha,ma,ga,re,re,
69    ni,ni,dha,ma,pa,ma
70  };
71  int i=0,l=sizeof(freq)/sizeof(int);
72  
73  for(i=0;i<l;i++){
74    tone(A5,freq[i]);
75    delay(150);
76    }
77}
78
79void  loop(){
80  human();
81//  robotic_hbd();
82}