Build Instructions

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  int m;  // initialise variable m
  float n; //initialise variable n
  
  void setup()
  {  
  pinMode(A0,INPUT);  // set pin a0 as input pin  Serial.begin(9600);// begin serial 
                                         communication between Arduino and pc
  }
  
  void loop()
  {  
  m=analogRead(A0);   // read analog values from pin A0 across capacitor   
  n=(m* .304177);    // converts analog value(x) into input ac supply value using this 
                              formula 
  Serial.print("   analaog input  " ) ;   // specify name to the corresponding value to 
                                                           be printed   
  Serial.print(m) ; // print input analog value on serial monitor  
  Serial.print("   ac voltage  ") ; // specify name to the corresponding value to be 
                                                    printed   
  Serial.print(n) ; // prints the ac value on Serial monitor   
  Serial.println();
  }

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