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Sharp sensor

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Sharp sensor

1. 1. R-tist
2. 2. R-tist12/6/2012 i-SKY TECHNOLOGIES 2
3. 3. SHARP SENSOR  IN AVR ADC IS IS INBUILT SO THERE IS NO NEED OF EXTERNAL CIRCUIT.  THIS SHARP SENSOR HAS RANGE OF ONLY 10 TO 80 CM.  WHEN IT IS OUT OF RANGE THAN IT GIVE RANDOM VALUE OF DISTANCE.  DUE TO THIS IN PROGRAM WE USE 0 VALUE WHEN IT IS OUT OF RANGE.R-tist 12/6/2012 i-SKY TECHNOLOGIES 3
4. 4. FORMULA FOR DISTANCECALCULATIONsensorValue = (6787 / (sensorValue - 3)) - 4;12/6/2012 R-tist i-SKY TECHNOLOGIES 4
5. 5. PROGRAM TO SHOW DIS. ONSERIAL PORT  #include <LiquidCrystal.h>  void loop() {  const int analogInPin = 0;  sensorValue =  float sensorValue = 0; analogRead(analogInPin);  LiquidCrystal lcd(4, 7, 8, 9,  lcd.setCursor(0, 0); 12, 13);  if(sensorValue<80)  void setup() {  sensorValue=0;  lcd.begin(16, 2);  else  }  sensorValue = (6787 / (sensorValue - 3)) - 4;  lcd.print(sensorValue);  lcd.print(" ");  delay(100);  }12/6/2012 R-tist i-SKY TECHNOLOGIES 5
6. 6. Q-: WRITE A PROGRAM TO DEMONSTRATE WHEN DISTANCE OF OBJECT IS LESS THAN 40 CM THAN RED LED OF RGB IS GLOW WHEN IT IS 40-50 GREEN LED IS GLOW AND WHEN IT IS GREATER THAN 50 BLUE LED GLOW12/6/2012 R-tist i-SKY TECHNOLOGIES 6