Arduino code samples

• AnalogRead Average reading

• LCD 16x2 basic connection

• 74HC595 shift with Arduino




AnalogRead Average reading

float readVoltage()
{
  float total=0;
  for(int n=0;n<100;n++)
   {
    float temp = (float) analogRead(A0);
    temp = 5.0 * temp/1024;
    total = total + temp;
    delay(1);
   }
 return total/100;
}




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LCD 16x2 basic connection

include <LiquidCrystal.h>

LiquidCrystal lcd(rs, enable, d4, d5, d6, d7);

void setup()
{
  lcd.begin(16, 2);
  lcd.setCursor(col, row);
  lcd.print("some tex");
}

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74HC595 shift with Arduino

//Pin connected to pin 12 (ST_CP) of 74HC595
int latchPin = 8;
//Pin connected to pin 11 (SH_CP) of 74HC595
int clockPin = 12;
////Pin connected to pin 14 (DS) of 74HC595
int dataPin = 11;

void setup() 
{
  pinMode(latchPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(dataPin, OUTPUT);	
}

void loop() 
{
ShiftData();	
}

void ShiftData() 
{
  for (int i = 0; i < 256; i++) {//shift from 0 to 255
    digitalWrite(latchPin, LOW);
    shiftOut(dataPin, clockPin, LSBFIRST, i);
    digitalWrite(latchPin, HIGH);
    delay(100);
  }
}

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