Display a real time temperature graph using the Nokia LCD5110 monochrome display

LCD5110_Temperature_Graph

// to convert thermistor readings to degrees F, see: 
//   http://playground.arduino.cc/ComponentLib/Thermistor2
//  #include <math.h>  // for thermistor temp conversion math

// get display library at http://rinkydinkelectronics.com/library.php?id=47
#include <LCD5110_Graph.h>

LCD5110 myScreen(8,9,10,11,12);    // create an instance of the display object
extern uint8_t SmallFont[];

int xPos = 0;
int yPos = 24;  // approx center of vertical

int thermistorPin = A0;  //set up thermistor voltage divider circuit
int ambientTemp = 780;   //thermistor reading - adjust to your reading
int highTemp = 815;      //warm up thermistor - record highest reading

void setup()
{
  myScreen.InitLCD();
  myScreen.setFont(SmallFont);
}

void loop()
{
  int rawTemp = analogRead(thermistorPin);
  myScreen.printNumI(rawTemp, 5, 30);

  //convert observed high and ambient temps to y axis values
  //note that the y axis starts at zero in upper left and increases going down the display
  yPos = map(rawTemp, ambientTemp, highTemp, 45, 2);

  if(xPos < 84)
  {
    myScreen.setPixel(xPos, yPos);    //draw a dot representing the temperature value
    xPos++;    //increment our x position
  }
  else
  {
    myScreen.clrScr();  //clear the screen
    xPos = 0;           //start over on left hand side of screen
  }

  myScreen.update();

  delay(250);  //adjust delay to increment x speed to your liking
               // if you want to update once each minute, use 60000

}