===============Curve_Tracer_Arduino_Code_Below===================
  int tri =          5;                         // TriAngle Wave      at D5
  int vg =           3;                         // Voltage step port  at D3
  int j  =           0;                         // Tri value
  int k =            0;                         // Step Value
  int slope =        4;
  int                incomingByte;              // read incoming serial data into


  void               setup() 
{ Serial.begin(      9600);                     // initialize serial communication:
  pinMode(           tri, OUTPUT);
  pinMode(           vg,  OUTPUT);
}                    // setup 

  void               loop() 
{ if                 (Serial.available() > 0)   // see if incoming serial data:
{ incomingByte =     Serial.read();             // read oldest byte in serial buffer:
} //                 if (Serial.available() > 0)
  if                 (incomingByte == 'H')      // if H (ASCII 72), printoutput
{ delay(             10);
  j =                j+slope;
  analogWrite(       tri, j);                   // will be PWM 488 Hz
  analogWrite(       vg, k);                    // will be PWM 488 Hz
  Serial.print(      analogRead(0));            // read current        at A0
  Serial.print(      " ");                                    
  Serial.println(    analogRead(1));            // read tri voltage    at A1
  delay(             10);                       // to stabilize adc:
  if                 (j > 251) slope = -4 ; 
  if                 (j < 1)   
{ slope =            4 ;
  k =                k + int(255/5);
} //                 if (j > 251) slope = -4 ;
  if                 (k > 255 )   k = 0 ;
} //                 if  (incomingByte == 'H') 
} //                 loop()

================Curve_Tracer_Processing_Code======================
import                processing.serial.*;
PrintWriter           output;                                     // output file
Serial                myPort;                                     // The serial port
int                   xPos = 1;                                   // hor position  graph

  void                setup () 
{ size(               300, 300);                                  // set the window size:
  println(            Serial.list());                             // List serial ports
  myPort =            new Serial(this, Serial.list()[0], 9600 );  // initialize to 9600 baud  
  myPort.bufferUntil('\n');                                       // serialEvent() @ \n:
  background(         0);                                         // set inital background:
  println(            "Click on image and hit s to start");       // will start serial data
  println(            "Hit w to write to file");                  // dump to file ad stop
  String file =       String.valueOf(year());
  file =              file +"."+String.valueOf(month());
  file =              file +"."+String.valueOf(day());
  file =              file +"."+String.valueOf(hour());
  file =              file +"."+String.valueOf(minute());
  file =              file +"."+String.valueOf(second())+".mat";
  println(            file);  
  output =            createWriter(file);                        // Sketch->Show_Sketch_fie
}                     // setup 

  void                draw () 
{ if(                 keyPressed) 
{ if                  (key == 's' || key == 'S') 
{ myPort.write(       "H");
}                     //if (key == 's' || key == 'S')
  if                  (key == 'w' || key == 'W') 
{ output.flush();     // Writes the remaining data to the file
  output.close();     // Finishes the file
  exit();             // Stops the program
}                     // if (key == 'w' || key == 'W')
}                     // if( keyPressed)
}                     // draw () 

  void                serialEvent (Serial myPort) 
{ String inString =   myPort.readStringUntil('\n');               // get the ASCII string:
  if                  (inString != null) 
{ inString =          trim(inString);                             // trim whitespace:
  int[] vv =          int(split(inString, ' '));
  // println(         inString );
  output.println(     inString );
  float val0 =        float(vv[0]);   
  float val1 =        float(vv[1]);   
  val0 =              map(val0, 0, 1023, 0, height*.95); 
  val1 =              map(val1, 0, 1023, 0, height*.95);
  stroke(             127,34,255);                                    // color to draw
  line(               val1, height - val0-1, val1+1, height - val0);  // draw the line:
  if                 (xPos >= 6*width) 
{ xPos =              0;                                              // auto redraw
  background(         0);                                             
}                     // if (xPos >= 2*width)
  else                 
{ xPos=               xPos+1;                                           
}                     // else                                                         
}                     // if (inString != null) 
}                     // serialEvent (Serial myPort) 


========Copy_Paste_Into_SciLab_Window===========================
z1 = read( '/Users/donsauer/Downloads/REF_SOURCE/WORK/curvetrace2/NPN.mat', -1, 2);    
V =        4.88e-3*z1( : , 2);
I =        4.88e-3*z1( : , 1);
plot(      V,I  );
xgrid();
xtitle(    "NPN_Ib_equal_5_5uA_steps","Collector_Voltage_V","Collector_Current_mA");
========Copy_Paste_Into_SciLab_Window===========================
z1 = read( '/Users/donsauer/Downloads/REF_SOURCE/WORK/curvetrace2/PNP.mat', -1, 2);    
V = 5      -4.88e-3*z1( : , 2);
I = 5      -4.88e-3*z1( : , 1);
plot(      V,I  );
xgrid();
xtitle(    "PNP_Ib_equal_5_5uA_steps","Collector_Voltage_V","Collector_Current_mA");
========Copy_Paste_Into_SciLab_Window===========================
z1 = read( '/Users/donsauer/Downloads/REF_SOURCE/WORK/curvetrace2/NMOS.mat', -1, 2);    
V =        4.88e-3*z1( : , 2);
I =        4.88e-3*z1( : , 1);
plot(      V,I  );
xgrid();
xtitle(    "NMOS_VG_equals_5_1Vsteps","Drain_Voltage_V","Drain_Current_mA");
========Copy_Paste_Into_SciLab_Window===========================
z1 = read( '/Users/donsauer/Downloads/REF_SOURCE/WORK/curvetrace2/PMOS.mat', -1, 2);    
V = 5      -4.88e-3*z1( : , 2);
I = 5      -4.88e-3*z1( : , 1);
plot(      V,I  );
xgrid();
xtitle(    "PMOS_VG_equals_5_1Vsteps","Drain_Voltage_V","Drain_Current_mA");
==============================================================



===========Cut_Paste_Into_Octave_Window===========================
load -ascii    /Users/donsauer/Downloads/REF_SOURCE/WORK/curvetrace2/NPN.mat
V =            4.88e-3* NPN( : , 2);
I =            4.88e-3* NPN( : , 1);
plot(          V,I  );
grid
title  (      "NPN Ib equal 5 5uA steps") 
xlabel (      "Collector Voltage V")      
ylabel (      "Collector Current mA")       

===========Cut_Paste_Into_Octave_Window===========================
load -ascii    /Users/donsauer/Downloads/REF_SOURCE/WORK/curvetrace2/PNP.mat
V =  5         -4.88e-3*PNP( : , 2);
I =  5         -4.88e-3*PNP( : , 1);
plot(          V,I  );
grid
title  (       "PNP Ib equal 5 5uA steps") 
xlabel (       "Collector Voltage V")      
ylabel (       "Collector Current mA")       

===========Cut_Paste_Into_Octave_Window===========================
load   -ascii /Users/donsauer/Downloads/REF_SOURCE/WORK/curvetrace2/NMOS.mat
V =           4.88e-3*NMOS( : , 2);
I =           4.88e-3*NMOS( : , 1);
plot(         V,I  );
grid;
title  (     "NMOS Vg equal 5 1V steps") ;
xlabel (     "Drain Voltage V");      
ylabel (     "Drain Current mA");       

===========Cut_Paste_Into_Octave_Window===========================
load   -ascii /Users/donsauer/Downloads/REF_SOURCE/WORK/curvetrace2/PMOS.mat
V = 5         -4.88e-3*PMOS( : , 2);
I = 5         -4.88e-3*PMOS( : , 1);
plot(         V,I  );
grid
title  (      "PMOS Vg equal 5 1V steps") 
xlabel (      "Drain Voltage V")      
ylabel (      "Drain Current mA")       
=================================================================