Arduino 2.4 inch TFT LCD Resistor Value finder by Color code

I made this project to calculate the resistor value by using entering the color code in TFT LCD (Arduino TFT LCD Project)

May 21, 2021

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tft lcd project

resistor value finder

arduino tft lcd

Components and supplies

2.4 inch TFT LCD Shield touch screen

Arduino UNO

USB-A to B Cable

Apps and platforms

Arduino IDE

Project description

Code

Resistor value calculator by TFT LCD Project

c_cpp

Use this calculator to find out the ohm value and tolerance based on resistor color codes.

1//This project is done by Teach Me Something
2#include <Adafruit_GFX.h>     // Core graphics library
3#include <MCUFRIEND_kbv.h>
4#include "TouchScreen.h"
5MCUFRIEND_kbv   tft;  
6/*______End of Libraries_______*/
7
8/*______Define LCD pins (I have   asigned the default values)_______*/
9#define YP A1  // must be an analog pin,   use "An" notation!
10#define XM A2  // must be an analog pin, use "An" notation!
11#define   YM 7   // can be a digital pin
12#define XP 6   // can be a digital pin
13#define   LCD_CS A3
14#define LCD_CD A2
15#define LCD_WR A1
16#define LCD_RD A0
17#define   LCD_RESET A4
18/*_______End of defanitions______*/
19
20/*______Assign names   to colors and pressure_______*/
21#define BLACK   0x0000
22#define BROWN   0x7980
23#define   RED     0xF800
24#define ORANGE  0xFBE0
25#define YELLOW  0xFFE0
26#define GREEN    0x07E0
27#define BLUE    0x001F
28#define VIOLET  0xA81F
29#define GREY    0x7BEF
30#define   WHITE   0xFFFF
31#define CYAN    0x07FF
32#define MAGENTA 0xF81F
33
34#define   MINPRESSURE 10
35#define MAXPRESSURE 1200
36/*_______Assigned______*/
37
38/*____Calibrate   TFT LCD_____*/
39#define TS_MINX 910  // left
40#define TS_MINY 760  // t09
41#define   TS_MAXX 180  // RT
42#define TS_MAXY 135  // Bot
43/*______End of Calibration______*/
44
45TouchScreen   ts = TouchScreen(XP, YP, XM, YM, 300); //300 is the sensitivity
46//Adafruit_TFTLCD   tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET); //Start communication with LCD
47
48String   symbol[3][4] = {
49  { "0", "1", "2", "3" },
50  { "4", "5", "6",   "7" },
51  { "8", "9", "C", "K" }
52};
53String colors[1][10]=
54   { "Black","Brown","Red","Orange","Yellow","Green","Blue","Violet","Grey","White"};
55   int X,Y;
56 int ring,ring1,ring2,ring3,ring4=0;
57 long Number1;
58 char C;
59   char K;
60 long resistance=0;
61void setup() {
62  Serial.begin(9600); //Use   serial monitor for debugging
63  tft.reset(); //Always reset at start
64  tft.begin(0x9341);   // My LCD uses LIL9341 Interface driver IC
65  tft.setRotation(2); // I just roated   so that the power jack faces up - optional
66  tft.invertDisplay(1);
67  IntroScreen();
68   draw_BoxNButtons(); 
69}
70
71void loop() {
72
73TSPoint p = waitTouch();
74X   = p.y; Y = p.x;
75Serial.print(X); Serial.print(','); Serial.println(Y);// + "   " + Y);
76
77
78DetectButtons();
79
80Ring();
81//if(ring>3)
82//calculation();   
83}
84
85
86TSPoint waitTouch() {
87  
88  TSPoint p;
89  do {
90    p   = ts.getPoint(); 
91    pinMode(XM, OUTPUT);
92    pinMode(YP, OUTPUT);
93  }   while((p.z < MINPRESSURE )|| (p.z > MAXPRESSURE));
94  p.x = map(p.x, TS_MINX,   TS_MAXX, 0, 320);
95  p.y = map(p.y, TS_MINY, TS_MAXY, 0, 240);;
96  return p;
97}
98
99
100void   DetectButtons()
101{
102
103  if ( X>135) //Detecting Buttons on Column 1
104  {
105     if (Y>0 && Y<60) //If Button 9 is pressed
106    {Serial.println ("Button 8");   
107       Number1=8;
108    }
109    
110     if (Y>60 && Y<120) //If Button 5   is pressed
111    {Serial.println ("Button 4"); 
112    Number1=4;
113    }
114     
115     if (Y>120 && Y<180) //If Button 1 is pressed
116    {Serial.println   ("Button 0"); 
117    
118    Number1=0;
119    }
120    
121     
122  }
123
124     if (X<135 && X>90) //Detecting Buttons on Column 2
125  {
126    if (Y>0 &&   Y<60)
127    {Serial.println ("Button 9"); //Button 10 is Pressed
128    
129     Number1=9;
130    }
131    
132     if (Y>60 && Y<120)
133    {Serial.println   ("Button 5"); 
134    Number1=5;
135    }
136    
137     if (Y>120 && Y<180)
138     {Serial.println ("Button 1"); 
139    Number1=1;
140    }
141    
142    
143   }
144
145    if (X<90 && X>40) //Detecting Buttons on Column 3
146  {
147    if   (Y>0 && Y<60)
148    {Serial.println ("Button C"); 
149    
150   ring=0;
151    ring1=0;
152   ring2=0;
153   ring3=0;
154   ring4=0;
155  
156   // IntroScreen();
157   draw_BoxNButtons(); 
158   resistance=0;
159   Number1=0;
160   
161//  finalvalue1=0;
162   delay(500);
163 
164  return;
165   
166    }
167    
168     if (Y>60 && Y<120)
169     {Serial.println ("Button 6"); 
170     Number1=6;
171    }
172    
173     if   (Y>120 && Y<180)
174    {Serial.println ("Button 2");
175    Number1=2;
176    }
177     
178  }
179
180      if (X<48) //Detecting Buttons on Column 4
181{
182    if   (Y>0 && Y<60)
183    {Serial.println ("Button K"); 
184
185    if(ring>3)
186calculation();
187else
188   draw_BoxNButtons(); 
189 
190     ring=-1;
191     ring1=0;
192     ring2=0;
193      ring3=0;
194     ring4=0;
195     delay(700);
196     }
197    
198     if   (Y>60 && Y<120)
199    {Serial.println ("Button 7"); 
200    Number1=7;
201    }
202     
203     if (Y>120 && Y<180)
204    {Serial.println ("Button 3");
205    Number1=3;
206     }
207  
208    
209  }
210  if(!(ring>3 || ring==-1))
211{
212    tft.setCursor(55,   28+(20*ring));
213    tft.setTextColor(RED);
214    tft.setTextSize(2);
215    tft.println(colors[0][Number1]);
216     delay(300);
217     ring++;
218} 
219else
220ring++;
221
222}
223
224
225
226
227
228void   IntroScreen()
229{tft.fillScreen(BLACK);
230  tft.setCursor (55, 50);
231  tft.setTextSize   (3);
232  tft.setTextColor(RED);
233  tft.println("ARDUINO");
234  tft.setTextColor(YELLOW);
235   tft.setCursor (60, 140);
236   tft.setTextSize (2);
237   tft.println("Resistor   ");
238   tft.setCursor (10, 170);
239   tft.println("Color Coding Game");
240   tft.setCursor (10, 230);
241  tft.setTextColor(BLUE);
242  tft.println("Teach   Me Something");
243  delay(4000);
244  
245}
246
247void draw_BoxNButtons()
248{
249   //Draw the Result Box
250    tft.fillRect(0, 0, 240, 140,BLUE);
251    tft.fillRect(20,   25, 20, 85,WHITE);
252    for(int a=0; a<3;a++)
253    {tft.drawLine(29+a,25,29+a,15,WHITE);
254     tft.drawLine(29+a,80,29+a,120,WHITE);
255    
256    }
257    tft.fillRect(20,35,20,3,BLACK);
258     tft.fillRect(20,55,20,3,BLACK);
259    
260    tft.fillRect(20,75,20,3,BLACK);
261     tft.fillRect(20,100,20,3,BLACK);
262     
263 //Draw First Column
264  tft.fillRect   (0,260,60,60,GREY);
265  tft.fillRect  (0,200,60,60,YELLOW);
266  tft.fillRect   (0,140,60,60,BLACK);
267
268 //Draw Second Column
269  tft.fillRect  (60,260,60,60,WHITE);
270   tft.fillRect  (60,200,60,60,GREEN);
271  tft.fillRect  (60,140,60,60,BROWN);
272
273   //Draw Third Column  
274  tft.fillRect  (120,260,60,60,BLACK);
275  tft.fillRect   (120,200,60,60,BLUE);
276  tft.fillRect  (120,140,60,60,RED);
277
278 //Draw 4th   Column  
279  tft.fillRect  (180,260,60,60,BLACK);
280  tft.fillRect  (180,200,60,60,MAGENTA);
281   tft.fillRect  (180,140,60,60,ORANGE);
282
283
284  //Draw Horizontal Lines
285   for (int h=140; h<=320; h+=60)
286  tft.drawFastHLine(0, h, 240, WHITE);
287
288   //Draw Vertical Lines
289  for (int v=0; v<=240; v+=60)
290  tft.drawFastVLine(v,   140, 240, WHITE);
291
292  //Display keypad lables 
293  for (int j=0;j<3;j++) {
294     for (int i=0;i<4;i++) {
295      tft.setCursor(22 + (60*i), 100 + (60*(j+1)));
296       tft.setTextSize(3);
297      tft.setTextColor(WHITE);
298      tft.println(symbol[j][i]);
299       
300    }
301     
302    
303  }
304     
305      tft.setTextSize(3);
306       tft.setTextColor(BLACK);
307      tft.setCursor(22 , 220);
308      tft.println("4");
309       tft.setCursor(82 , 280);
310      tft.println("9");
311      tft.setTextColor(RED);
312       tft.setCursor(22 , 280);
313      tft.println("8");
314        tft.fillRect   (181,261,60,60,BLACK);
315       
316        tft.setTextSize(3);
317        tft.setCursor(195   , 280);
318      tft.println("OK");
319}
320
321void Ring()
322{
323if(ring==1)
324ring1=Number1;
325if(ring==2)
326ring2=Number1;
327if(ring==3)
328ring3=Number1;
329if(ring==4)
330ring4=Number1;
331}   
332
333
334void calculation()
335{
336 
337  long test;
338  float finalvalue1;
339   int mega=0;
340  
341  if(ring3==0)
342  test=1;
343  if(ring3==1)
344  test=10;
345   if(ring3==2)
346  test=100;
347  if(ring3==3)
348  test=1000;
349  if(ring3==4)
350   test=10000;
351  if(ring3==5)
352  {test=1;
353  mega=1;};
354  if(ring3==6)
355   {test=10;
356  mega=1;}
357  if(ring3==7)
358   {test=100;
359  mega=1;}
360  if(ring3==8)
361    {test=1000;
362  mega=1;}
363  if(ring3==9)
364   {test=10000;
365  mega=1;}
366resistance=   (ring1*10+ring2)*test;teac
367Serial.println(resistance);
368Serial.println(ring1);
369Serial.println(ring2);
370Serial.println(ring3);
371
372
373   tft.setTextSize(3);
374tft.setTextColor(WHITE);
375tft.setCursor(145 , 20);
376if(resistance<1000   && mega==0)
377{tft.println(resistance);
378 tft.setCursor(145 , 50);
379tft.print("Ohms");   
380}
381else if(resistance>999 && mega==0)
382{
383  
384  finalvalue1=(float)resistance/1000;
385   tft.print(finalvalue1);
386  tft.setCursor(145 , 60);
387  tft.print("K.Ohm");
388}     
389else 
390{
391  
392  finalvalue1=(float)resistance/10;
393  tft.print(finalvalue1);
394   tft.setCursor(145 , 60);
395  tft.print("M.Ohm");
396}    
397  ring=0;
398}

//This project is done by Teach Me Something
#include <Adafruit_GFX.h>     // Core graphics library
#include <MCUFRIEND_kbv.h>
#include "TouchScreen.h"
MCUFRIEND_kbv   tft;  
/*______End of Libraries_______*/

/*______Define LCD pins (I have   asigned the default values)_______*/
#define YP A1  // must be an analog pin,   use "An" notation!
#define XM A2  // must be an analog pin, use "An" notation!
#define   YM 7   // can be a digital pin
#define XP 6   // can be a digital pin
#define   LCD_CS A3
#define LCD_CD A2
#define LCD_WR A1
#define LCD_RD A0
#define   LCD_RESET A4
/*_______End of defanitions______*/

/*______Assign names   to colors and pressure_______*/
#define BLACK   0x0000
#define BROWN   0x7980
#define   RED     0xF800
#define ORANGE  0xFBE0
#define YELLOW  0xFFE0
#define GREEN    0x07E0
#define BLUE    0x001F
#define VIOLET  0xA81F
#define GREY    0x7BEF
#define   WHITE   0xFFFF
#define CYAN    0x07FF
#define MAGENTA 0xF81F

#define   MINPRESSURE 10
#define MAXPRESSURE 1200
/*_______Assigned______*/

/*____Calibrate   TFT LCD_____*/
#define TS_MINX 910  // left
#define TS_MINY 760  // t09
#define   TS_MAXX 180  // RT
#define TS_MAXY 135  // Bot
/*______End of Calibration______*/

TouchScreen   ts = TouchScreen(XP, YP, XM, YM, 300); //300 is the sensitivity
//Adafruit_TFTLCD   tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET); //Start communication with LCD

String   symbol[3][4] = {
  { "0", "1", "2", "3" },
  { "4", "5", "6",   "7" },
  { "8", "9", "C", "K" }
};
String colors[1][10]=
   { "Black","Brown","Red","Orange","Yellow","Green","Blue","Violet","Grey","White"};
   int X,Y;
 int ring,ring1,ring2,ring3,ring4=0;
 long Number1;
 char C;
   char K;
 long resistance=0;
void setup() {
  Serial.begin(9600); //Use   serial monitor for debugging
  tft.reset(); //Always reset at start
  tft.begin(0x9341);   // My LCD uses LIL9341 Interface driver IC
  tft.setRotation(2); // I just roated   so that the power jack faces up - optional
  tft.invertDisplay(1);
  IntroScreen();
   draw_BoxNButtons(); 
}

void loop() {

TSPoint p = waitTouch();
X   = p.y; Y = p.x;
Serial.print(X); Serial.print(','); Serial.println(Y);// + "   " + Y);


DetectButtons();

Ring();
//if(ring>3)
//calculation();   
}


TSPoint waitTouch() {
  
  TSPoint p;
  do {
    p   = ts.getPoint(); 
    pinMode(XM, OUTPUT);
    pinMode(YP, OUTPUT);
  }   while((p.z < MINPRESSURE )|| (p.z > MAXPRESSURE));
  p.x = map(p.x, TS_MINX,   TS_MAXX, 0, 320);
  p.y = map(p.y, TS_MINY, TS_MAXY, 0, 240);;
  return p;
}


void   DetectButtons()
{

  if ( X>135) //Detecting Buttons on Column 1
  {
     if (Y>0 && Y<60) //If Button 9 is pressed
    {Serial.println ("Button 8");   
       Number1=8;
    }
    
     if (Y>60 && Y<120) //If Button 5   is pressed
    {Serial.println ("Button 4"); 
    Number1=4;
    }
     
     if (Y>120 && Y<180) //If Button 1 is pressed
    {Serial.println   ("Button 0"); 
    
    Number1=0;
    }
    
     
  }

     if (X<135 && X>90) //Detecting Buttons on Column 2
  {
    if (Y>0 &&   Y<60)
    {Serial.println ("Button 9"); //Button 10 is Pressed
    
     Number1=9;
    }
    
     if (Y>60 && Y<120)
    {Serial.println   ("Button 5"); 
    Number1=5;
    }
    
     if (Y>120 && Y<180)
     {Serial.println ("Button 1"); 
    Number1=1;
    }
    
    
   }

    if (X<90 && X>40) //Detecting Buttons on Column 3
  {
    if   (Y>0 && Y<60)
    {Serial.println ("Button C"); 
    
   ring=0;
    ring1=0;
   ring2=0;
   ring3=0;
   ring4=0;
  
   // IntroScreen();
   draw_BoxNButtons(); 
   resistance=0;
   Number1=0;
   
//  finalvalue1=0;
   delay(500);
 
  return;
   
    }
    
     if (Y>60 && Y<120)
     {Serial.println ("Button 6"); 
     Number1=6;
    }
    
     if   (Y>120 && Y<180)
    {Serial.println ("Button 2");
    Number1=2;
    }
     
  }

      if (X<48) //Detecting Buttons on Column 4
{
    if   (Y>0 && Y<60)
    {Serial.println ("Button K"); 

    if(ring>3)
calculation();
else
   draw_BoxNButtons(); 
 
     ring=-1;
     ring1=0;
     ring2=0;
      ring3=0;
     ring4=0;
     delay(700);
     }
    
     if   (Y>60 && Y<120)
    {Serial.println ("Button 7"); 
    Number1=7;
    }
     
     if (Y>120 && Y<180)
    {Serial.println ("Button 3");
    Number1=3;
     }
  
    
  }
  if(!(ring>3 || ring==-1))
{
    tft.setCursor(55,   28+(20*ring));
    tft.setTextColor(RED);
    tft.setTextSize(2);
    tft.println(colors[0][Number1]);
     delay(300);
     ring++;
} 
else
ring++;

}





void   IntroScreen()
{tft.fillScreen(BLACK);
  tft.setCursor (55, 50);
  tft.setTextSize   (3);
  tft.setTextColor(RED);
  tft.println("ARDUINO");
  tft.setTextColor(YELLOW);
   tft.setCursor (60, 140);
   tft.setTextSize (2);
   tft.println("Resistor   ");
   tft.setCursor (10, 170);
   tft.println("Color Coding Game");
   tft.setCursor (10, 230);
  tft.setTextColor(BLUE);
  tft.println("Teach   Me Something");
  delay(4000);
  
}

void draw_BoxNButtons()
{
   //Draw the Result Box
    tft.fillRect(0, 0, 240, 140,BLUE);
    tft.fillRect(20,   25, 20, 85,WHITE);
    for(int a=0; a<3;a++)
    {tft.drawLine(29+a,25,29+a,15,WHITE);
     tft.drawLine(29+a,80,29+a,120,WHITE);
    
    }
    tft.fillRect(20,35,20,3,BLACK);
     tft.fillRect(20,55,20,3,BLACK);
    
    tft.fillRect(20,75,20,3,BLACK);
     tft.fillRect(20,100,20,3,BLACK);
     
 //Draw First Column
  tft.fillRect   (0,260,60,60,GREY);
  tft.fillRect  (0,200,60,60,YELLOW);
  tft.fillRect   (0,140,60,60,BLACK);

 //Draw Second Column
  tft.fillRect  (60,260,60,60,WHITE);
   tft.fillRect  (60,200,60,60,GREEN);
  tft.fillRect  (60,140,60,60,BROWN);

   //Draw Third Column  
  tft.fillRect  (120,260,60,60,BLACK);
  tft.fillRect   (120,200,60,60,BLUE);
  tft.fillRect  (120,140,60,60,RED);

 //Draw 4th   Column  
  tft.fillRect  (180,260,60,60,BLACK);
  tft.fillRect  (180,200,60,60,MAGENTA);
   tft.fillRect  (180,140,60,60,ORANGE);


  //Draw Horizontal Lines
   for (int h=140; h<=320; h+=60)
  tft.drawFastHLine(0, h, 240, WHITE);

   //Draw Vertical Lines
  for (int v=0; v<=240; v+=60)
  tft.drawFastVLine(v,   140, 240, WHITE);

  //Display keypad lables 
  for (int j=0;j<3;j++) {
     for (int i=0;i<4;i++) {
      tft.setCursor(22 + (60*i), 100 + (60*(j+1)));
       tft.setTextSize(3);
      tft.setTextColor(WHITE);
      tft.println(symbol[j][i]);
       
    }
     
    
  }
     
      tft.setTextSize(3);
       tft.setTextColor(BLACK);
      tft.setCursor(22 , 220);
      tft.println("4");
       tft.setCursor(82 , 280);
      tft.println("9");
      tft.setTextColor(RED);
       tft.setCursor(22 , 280);
      tft.println("8");
        tft.fillRect   (181,261,60,60,BLACK);
       
        tft.setTextSize(3);
        tft.setCursor(195   , 280);
      tft.println("OK");
}

void Ring()
{
if(ring==1)
ring1=Number1;
if(ring==2)
ring2=Number1;
if(ring==3)
ring3=Number1;
if(ring==4)
ring4=Number1;
}   


void calculation()
{
 
  long test;
  float finalvalue1;
   int mega=0;
  
  if(ring3==0)
  test=1;
  if(ring3==1)
  test=10;
   if(ring3==2)
  test=100;
  if(ring3==3)
  test=1000;
  if(ring3==4)
   test=10000;
  if(ring3==5)
  {test=1;
  mega=1;};
  if(ring3==6)
   {test=10;
  mega=1;}
  if(ring3==7)
   {test=100;
  mega=1;}
  if(ring3==8)
    {test=1000;
  mega=1;}
  if(ring3==9)
   {test=10000;
  mega=1;}
resistance=   (ring1*10+ring2)*test;teac
Serial.println(resistance);
Serial.println(ring1);
Serial.println(ring2);
Serial.println(ring3);


   tft.setTextSize(3);
tft.setTextColor(WHITE);
tft.setCursor(145 , 20);
if(resistance<1000   && mega==0)
{tft.println(resistance);
 tft.setCursor(145 , 50);
tft.print("Ohms");   
}
else if(resistance>999 && mega==0)
{
  
  finalvalue1=(float)resistance/1000;
   tft.print(finalvalue1);
  tft.setCursor(145 , 60);
  tft.print("K.Ohm");
}     
else 
{
  
  finalvalue1=(float)resistance/10;
  tft.print(finalvalue1);
   tft.setCursor(145 , 60);
  tft.print("M.Ohm");
}    
  ring=0;
}

Resistor value calculator by TFT LCD Project

c_cpp

Use this calculator to find out the ohm value and tolerance based on resistor color codes.

1//This project is done by Teach Me Something
2#include <Adafruit_GFX.h>    // Core graphics library
3#include <MCUFRIEND_kbv.h>
4#include "TouchScreen.h"
5MCUFRIEND_kbv  tft;  
6/*______End of Libraries_______*/
7
8/*______Define LCD pins (I have  asigned the default values)_______*/
9#define YP A1  // must be an analog pin,  use "An" notation!
10#define XM A2  // must be an analog pin, use "An" notation!
11#define  YM 7   // can be a digital pin
12#define XP 6   // can be a digital pin
13#define  LCD_CS A3
14#define LCD_CD A2
15#define LCD_WR A1
16#define LCD_RD A0
17#define  LCD_RESET A4
18/*_______End of defanitions______*/
19
20/*______Assign names  to colors and pressure_______*/
21#define BLACK   0x0000
22#define BROWN   0x7980
23#define  RED     0xF800
24#define ORANGE  0xFBE0
25#define YELLOW  0xFFE0
26#define GREEN   0x07E0
27#define BLUE    0x001F
28#define VIOLET  0xA81F
29#define GREY    0x7BEF
30#define  WHITE   0xFFFF
31#define CYAN    0x07FF
32#define MAGENTA 0xF81F
33
34#define  MINPRESSURE 10
35#define MAXPRESSURE 1200
36/*_______Assigned______*/
37
38/*____Calibrate  TFT LCD_____*/
39#define TS_MINX 910  // left
40#define TS_MINY 760  // t09
41#define  TS_MAXX 180  // RT
42#define TS_MAXY 135  // Bot
43/*______End of Calibration______*/
44
45TouchScreen  ts = TouchScreen(XP, YP, XM, YM, 300); //300 is the sensitivity
46//Adafruit_TFTLCD  tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET); //Start communication with LCD
47
48String  symbol[3][4] = {
49  { "0", "1", "2", "3" },
50  { "4", "5", "6",  "7" },
51  { "8", "9", "C", "K" }
52};
53String colors[1][10]=
54  { "Black","Brown","Red","Orange","Yellow","Green","Blue","Violet","Grey","White"};
55  int X,Y;
56 int ring,ring1,ring2,ring3,ring4=0;
57 long Number1;
58 char C;
59  char K;
60 long resistance=0;
61void setup() {
62  Serial.begin(9600); //Use  serial monitor for debugging
63  tft.reset(); //Always reset at start
64  tft.begin(0x9341);  // My LCD uses LIL9341 Interface driver IC
65  tft.setRotation(2); // I just roated  so that the power jack faces up - optional
66  tft.invertDisplay(1);
67  IntroScreen();
68  draw_BoxNButtons(); 
69}
70
71void loop() {
72
73TSPoint p = waitTouch();
74X  = p.y; Y = p.x;
75Serial.print(X); Serial.print(','); Serial.println(Y);// + "  " + Y);
76
77
78DetectButtons();
79
80Ring();
81//if(ring>3)
82//calculation();  
83}
84
85
86TSPoint waitTouch() {
87  
88  TSPoint p;
89  do {
90    p  = ts.getPoint(); 
91    pinMode(XM, OUTPUT);
92    pinMode(YP, OUTPUT);
93  }  while((p.z < MINPRESSURE )|| (p.z > MAXPRESSURE));
94  p.x = map(p.x, TS_MINX,  TS_MAXX, 0, 320);
95  p.y = map(p.y, TS_MINY, TS_MAXY, 0, 240);;
96  return p;
97}
98
99
100void  DetectButtons()
101{
102
103  if ( X>135) //Detecting Buttons on Column 1
104  {
105    if (Y>0 && Y<60) //If Button 9 is pressed
106    {Serial.println ("Button 8");  
107       Number1=8;
108    }
109    
110     if (Y>60 && Y<120) //If Button 5  is pressed
111    {Serial.println ("Button 4"); 
112    Number1=4;
113    }
114    
115     if (Y>120 && Y<180) //If Button 1 is pressed
116    {Serial.println  ("Button 0"); 
117    
118    Number1=0;
119    }
120    
121     
122  }
123
124    if (X<135 && X>90) //Detecting Buttons on Column 2
125  {
126    if (Y>0 &&  Y<60)
127    {Serial.println ("Button 9"); //Button 10 is Pressed
128    
129    Number1=9;
130    }
131    
132     if (Y>60 && Y<120)
133    {Serial.println  ("Button 5"); 
134    Number1=5;
135    }
136    
137     if (Y>120 && Y<180)
138    {Serial.println ("Button 1"); 
139    Number1=1;
140    }
141    
142    
143  }
144
145    if (X<90 && X>40) //Detecting Buttons on Column 3
146  {
147    if  (Y>0 && Y<60)
148    {Serial.println ("Button C"); 
149    
150   ring=0;
151   ring1=0;
152   ring2=0;
153   ring3=0;
154   ring4=0;
155  
156   // IntroScreen();
157  draw_BoxNButtons(); 
158   resistance=0;
159   Number1=0;
160   
161//  finalvalue1=0;
162  delay(500);
163 
164  return;
165   
166    }
167    
168     if (Y>60 && Y<120)
169    {Serial.println ("Button 6"); 
170     Number1=6;
171    }
172    
173     if  (Y>120 && Y<180)
174    {Serial.println ("Button 2");
175    Number1=2;
176    }
177    
178  }
179
180      if (X<48) //Detecting Buttons on Column 4
181{
182    if  (Y>0 && Y<60)
183    {Serial.println ("Button K"); 
184
185    if(ring>3)
186calculation();
187else
188  draw_BoxNButtons(); 
189 
190     ring=-1;
191     ring1=0;
192     ring2=0;
193     ring3=0;
194     ring4=0;
195     delay(700);
196     }
197    
198     if  (Y>60 && Y<120)
199    {Serial.println ("Button 7"); 
200    Number1=7;
201    }
202    
203     if (Y>120 && Y<180)
204    {Serial.println ("Button 3");
205    Number1=3;
206    }
207  
208    
209  }
210  if(!(ring>3 || ring==-1))
211{
212    tft.setCursor(55,  28+(20*ring));
213    tft.setTextColor(RED);
214    tft.setTextSize(2);
215    tft.println(colors[0][Number1]);
216    delay(300);
217     ring++;
218} 
219else
220ring++;
221
222}
223
224
225
226
227
228void  IntroScreen()
229{tft.fillScreen(BLACK);
230  tft.setCursor (55, 50);
231  tft.setTextSize  (3);
232  tft.setTextColor(RED);
233  tft.println("ARDUINO");
234  tft.setTextColor(YELLOW);
235  tft.setCursor (60, 140);
236   tft.setTextSize (2);
237   tft.println("Resistor  ");
238   tft.setCursor (10, 170);
239   tft.println("Color Coding Game");
240  tft.setCursor (10, 230);
241  tft.setTextColor(BLUE);
242  tft.println("Teach  Me Something");
243  delay(4000);
244  
245}
246
247void draw_BoxNButtons()
248{
249  //Draw the Result Box
250    tft.fillRect(0, 0, 240, 140,BLUE);
251    tft.fillRect(20,  25, 20, 85,WHITE);
252    for(int a=0; a<3;a++)
253    {tft.drawLine(29+a,25,29+a,15,WHITE);
254    tft.drawLine(29+a,80,29+a,120,WHITE);
255    
256    }
257    tft.fillRect(20,35,20,3,BLACK);
258    tft.fillRect(20,55,20,3,BLACK);
259    
260    tft.fillRect(20,75,20,3,BLACK);
261    tft.fillRect(20,100,20,3,BLACK);
262     
263 //Draw First Column
264  tft.fillRect  (0,260,60,60,GREY);
265  tft.fillRect  (0,200,60,60,YELLOW);
266  tft.fillRect  (0,140,60,60,BLACK);
267
268 //Draw Second Column
269  tft.fillRect  (60,260,60,60,WHITE);
270  tft.fillRect  (60,200,60,60,GREEN);
271  tft.fillRect  (60,140,60,60,BROWN);
272
273  //Draw Third Column  
274  tft.fillRect  (120,260,60,60,BLACK);
275  tft.fillRect  (120,200,60,60,BLUE);
276  tft.fillRect  (120,140,60,60,RED);
277
278 //Draw 4th  Column  
279  tft.fillRect  (180,260,60,60,BLACK);
280  tft.fillRect  (180,200,60,60,MAGENTA);
281  tft.fillRect  (180,140,60,60,ORANGE);
282
283
284  //Draw Horizontal Lines
285  for (int h=140; h<=320; h+=60)
286  tft.drawFastHLine(0, h, 240, WHITE);
287
288  //Draw Vertical Lines
289  for (int v=0; v<=240; v+=60)
290  tft.drawFastVLine(v,  140, 240, WHITE);
291
292  //Display keypad lables 
293  for (int j=0;j<3;j++) {
294    for (int i=0;i<4;i++) {
295      tft.setCursor(22 + (60*i), 100 + (60*(j+1)));
296      tft.setTextSize(3);
297      tft.setTextColor(WHITE);
298      tft.println(symbol[j][i]);
299      
300    }
301     
302    
303  }
304     
305      tft.setTextSize(3);
306      tft.setTextColor(BLACK);
307      tft.setCursor(22 , 220);
308      tft.println("4");
309      tft.setCursor(82 , 280);
310      tft.println("9");
311      tft.setTextColor(RED);
312      tft.setCursor(22 , 280);
313      tft.println("8");
314        tft.fillRect  (181,261,60,60,BLACK);
315       
316        tft.setTextSize(3);
317        tft.setCursor(195  , 280);
318      tft.println("OK");
319}
320
321void Ring()
322{
323if(ring==1)
324ring1=Number1;
325if(ring==2)
326ring2=Number1;
327if(ring==3)
328ring3=Number1;
329if(ring==4)
330ring4=Number1;
331}  
332
333
334void calculation()
335{
336 
337  long test;
338  float finalvalue1;
339  int mega=0;
340  
341  if(ring3==0)
342  test=1;
343  if(ring3==1)
344  test=10;
345  if(ring3==2)
346  test=100;
347  if(ring3==3)
348  test=1000;
349  if(ring3==4)
350  test=10000;
351  if(ring3==5)
352  {test=1;
353  mega=1;};
354  if(ring3==6)
355  {test=10;
356  mega=1;}
357  if(ring3==7)
358   {test=100;
359  mega=1;}
360  if(ring3==8)
361   {test=1000;
362  mega=1;}
363  if(ring3==9)
364   {test=10000;
365  mega=1;}
366resistance=  (ring1*10+ring2)*test;teac
367Serial.println(resistance);
368Serial.println(ring1);
369Serial.println(ring2);
370Serial.println(ring3);
371
372
373  tft.setTextSize(3);
374tft.setTextColor(WHITE);
375tft.setCursor(145 , 20);
376if(resistance<1000  && mega==0)
377{tft.println(resistance);
378 tft.setCursor(145 , 50);
379tft.print("Ohms");  
380}
381else if(resistance>999 && mega==0)
382{
383  
384  finalvalue1=(float)resistance/1000;
385  tft.print(finalvalue1);
386  tft.setCursor(145 , 60);
387  tft.print("K.Ohm");
388}    
389else 
390{
391  
392  finalvalue1=(float)resistance/10;
393  tft.print(finalvalue1);
394  tft.setCursor(145 , 60);
395  tft.print("M.Ohm");
396}    
397  ring=0;
398}

//This project is done by Teach Me Something
#include <Adafruit_GFX.h>    // Core graphics library
#include <MCUFRIEND_kbv.h>
#include "TouchScreen.h"
MCUFRIEND_kbv  tft;  
/*______End of Libraries_______*/

/*______Define LCD pins (I have  asigned the default values)_______*/
#define YP A1  // must be an analog pin,  use "An" notation!
#define XM A2  // must be an analog pin, use "An" notation!
#define  YM 7   // can be a digital pin
#define XP 6   // can be a digital pin
#define  LCD_CS A3
#define LCD_CD A2
#define LCD_WR A1
#define LCD_RD A0
#define  LCD_RESET A4
/*_______End of defanitions______*/

/*______Assign names  to colors and pressure_______*/
#define BLACK   0x0000
#define BROWN   0x7980
#define  RED     0xF800
#define ORANGE  0xFBE0
#define YELLOW  0xFFE0
#define GREEN   0x07E0
#define BLUE    0x001F
#define VIOLET  0xA81F
#define GREY    0x7BEF
#define  WHITE   0xFFFF
#define CYAN    0x07FF
#define MAGENTA 0xF81F

#define  MINPRESSURE 10
#define MAXPRESSURE 1200
/*_______Assigned______*/

/*____Calibrate  TFT LCD_____*/
#define TS_MINX 910  // left
#define TS_MINY 760  // t09
#define  TS_MAXX 180  // RT
#define TS_MAXY 135  // Bot
/*______End of Calibration______*/

TouchScreen  ts = TouchScreen(XP, YP, XM, YM, 300); //300 is the sensitivity
//Adafruit_TFTLCD  tft(LCD_CS, LCD_CD, LCD_WR, LCD_RD, LCD_RESET); //Start communication with LCD

String  symbol[3][4] = {
  { "0", "1", "2", "3" },
  { "4", "5", "6",  "7" },
  { "8", "9", "C", "K" }
};
String colors[1][10]=
  { "Black","Brown","Red","Orange","Yellow","Green","Blue","Violet","Grey","White"};
  int X,Y;
 int ring,ring1,ring2,ring3,ring4=0;
 long Number1;
 char C;
  char K;
 long resistance=0;
void setup() {
  Serial.begin(9600); //Use  serial monitor for debugging
  tft.reset(); //Always reset at start
  tft.begin(0x9341);  // My LCD uses LIL9341 Interface driver IC
  tft.setRotation(2); // I just roated  so that the power jack faces up - optional
  tft.invertDisplay(1);
  IntroScreen();
  draw_BoxNButtons(); 
}

void loop() {

TSPoint p = waitTouch();
X  = p.y; Y = p.x;
Serial.print(X); Serial.print(','); Serial.println(Y);// + "  " + Y);


DetectButtons();

Ring();
//if(ring>3)
//calculation();  
}


TSPoint waitTouch() {
  
  TSPoint p;
  do {
    p  = ts.getPoint(); 
    pinMode(XM, OUTPUT);
    pinMode(YP, OUTPUT);
  }  while((p.z < MINPRESSURE )|| (p.z > MAXPRESSURE));
  p.x = map(p.x, TS_MINX,  TS_MAXX, 0, 320);
  p.y = map(p.y, TS_MINY, TS_MAXY, 0, 240);;
  return p;
}


void  DetectButtons()
{

  if ( X>135) //Detecting Buttons on Column 1
  {
    if (Y>0 && Y<60) //If Button 9 is pressed
    {Serial.println ("Button 8");  
       Number1=8;
    }
    
     if (Y>60 && Y<120) //If Button 5  is pressed
    {Serial.println ("Button 4"); 
    Number1=4;
    }
    
     if (Y>120 && Y<180) //If Button 1 is pressed
    {Serial.println  ("Button 0"); 
    
    Number1=0;
    }
    
     
  }

    if (X<135 && X>90) //Detecting Buttons on Column 2
  {
    if (Y>0 &&  Y<60)
    {Serial.println ("Button 9"); //Button 10 is Pressed
    
    Number1=9;
    }
    
     if (Y>60 && Y<120)
    {Serial.println  ("Button 5"); 
    Number1=5;
    }
    
     if (Y>120 && Y<180)
    {Serial.println ("Button 1"); 
    Number1=1;
    }
    
    
  }

    if (X<90 && X>40) //Detecting Buttons on Column 3
  {
    if  (Y>0 && Y<60)
    {Serial.println ("Button C"); 
    
   ring=0;
   ring1=0;
   ring2=0;
   ring3=0;
   ring4=0;
  
   // IntroScreen();
  draw_BoxNButtons(); 
   resistance=0;
   Number1=0;
   
//  finalvalue1=0;
  delay(500);
 
  return;
   
    }
    
     if (Y>60 && Y<120)
    {Serial.println ("Button 6"); 
     Number1=6;
    }
    
     if  (Y>120 && Y<180)
    {Serial.println ("Button 2");
    Number1=2;
    }
    
  }

      if (X<48) //Detecting Buttons on Column 4
{
    if  (Y>0 && Y<60)
    {Serial.println ("Button K"); 

    if(ring>3)
calculation();
else
  draw_BoxNButtons(); 
 
     ring=-1;
     ring1=0;
     ring2=0;
     ring3=0;
     ring4=0;
     delay(700);
     }
    
     if  (Y>60 && Y<120)
    {Serial.println ("Button 7"); 
    Number1=7;
    }
    
     if (Y>120 && Y<180)
    {Serial.println ("Button 3");
    Number1=3;
    }
  
    
  }
  if(!(ring>3 || ring==-1))
{
    tft.setCursor(55,  28+(20*ring));
    tft.setTextColor(RED);
    tft.setTextSize(2);
    tft.println(colors[0][Number1]);
    delay(300);
     ring++;
} 
else
ring++;

}





void  IntroScreen()
{tft.fillScreen(BLACK);
  tft.setCursor (55, 50);
  tft.setTextSize  (3);
  tft.setTextColor(RED);
  tft.println("ARDUINO");
  tft.setTextColor(YELLOW);
  tft.setCursor (60, 140);
   tft.setTextSize (2);
   tft.println("Resistor  ");
   tft.setCursor (10, 170);
   tft.println("Color Coding Game");
  tft.setCursor (10, 230);
  tft.setTextColor(BLUE);
  tft.println("Teach  Me Something");
  delay(4000);
  
}

void draw_BoxNButtons()
{
  //Draw the Result Box
    tft.fillRect(0, 0, 240, 140,BLUE);
    tft.fillRect(20,  25, 20, 85,WHITE);
    for(int a=0; a<3;a++)
    {tft.drawLine(29+a,25,29+a,15,WHITE);
    tft.drawLine(29+a,80,29+a,120,WHITE);
    
    }
    tft.fillRect(20,35,20,3,BLACK);
    tft.fillRect(20,55,20,3,BLACK);
    
    tft.fillRect(20,75,20,3,BLACK);
    tft.fillRect(20,100,20,3,BLACK);
     
 //Draw First Column
  tft.fillRect  (0,260,60,60,GREY);
  tft.fillRect  (0,200,60,60,YELLOW);
  tft.fillRect  (0,140,60,60,BLACK);

 //Draw Second Column
  tft.fillRect  (60,260,60,60,WHITE);
  tft.fillRect  (60,200,60,60,GREEN);
  tft.fillRect  (60,140,60,60,BROWN);

  //Draw Third Column  
  tft.fillRect  (120,260,60,60,BLACK);
  tft.fillRect  (120,200,60,60,BLUE);
  tft.fillRect  (120,140,60,60,RED);

 //Draw 4th  Column  
  tft.fillRect  (180,260,60,60,BLACK);
  tft.fillRect  (180,200,60,60,MAGENTA);
  tft.fillRect  (180,140,60,60,ORANGE);


  //Draw Horizontal Lines
  for (int h=140; h<=320; h+=60)
  tft.drawFastHLine(0, h, 240, WHITE);

  //Draw Vertical Lines
  for (int v=0; v<=240; v+=60)
  tft.drawFastVLine(v,  140, 240, WHITE);

  //Display keypad lables 
  for (int j=0;j<3;j++) {
    for (int i=0;i<4;i++) {
      tft.setCursor(22 + (60*i), 100 + (60*(j+1)));
      tft.setTextSize(3);
      tft.setTextColor(WHITE);
      tft.println(symbol[j][i]);
      
    }
     
    
  }
     
      tft.setTextSize(3);
      tft.setTextColor(BLACK);
      tft.setCursor(22 , 220);
      tft.println("4");
      tft.setCursor(82 , 280);
      tft.println("9");
      tft.setTextColor(RED);
      tft.setCursor(22 , 280);
      tft.println("8");
        tft.fillRect  (181,261,60,60,BLACK);
       
        tft.setTextSize(3);
        tft.setCursor(195  , 280);
      tft.println("OK");
}

void Ring()
{
if(ring==1)
ring1=Number1;
if(ring==2)
ring2=Number1;
if(ring==3)
ring3=Number1;
if(ring==4)
ring4=Number1;
}  


void calculation()
{
 
  long test;
  float finalvalue1;
  int mega=0;
  
  if(ring3==0)
  test=1;
  if(ring3==1)
  test=10;
  if(ring3==2)
  test=100;
  if(ring3==3)
  test=1000;
  if(ring3==4)
  test=10000;
  if(ring3==5)
  {test=1;
  mega=1;};
  if(ring3==6)
  {test=10;
  mega=1;}
  if(ring3==7)
   {test=100;
  mega=1;}
  if(ring3==8)
   {test=1000;
  mega=1;}
  if(ring3==9)
   {test=10000;
  mega=1;}
resistance=  (ring1*10+ring2)*test;teac
Serial.println(resistance);
Serial.println(ring1);
Serial.println(ring2);
Serial.println(ring3);


  tft.setTextSize(3);
tft.setTextColor(WHITE);
tft.setCursor(145 , 20);
if(resistance<1000  && mega==0)
{tft.println(resistance);
 tft.setCursor(145 , 50);
tft.print("Ohms");  
}
else if(resistance>999 && mega==0)
{
  
  finalvalue1=(float)resistance/1000;
  tft.print(finalvalue1);
  tft.setCursor(145 , 60);
  tft.print("K.Ohm");
}    
else 
{
  
  finalvalue1=(float)resistance/10;
  tft.print(finalvalue1);
  tft.setCursor(145 , 60);
  tft.print("M.Ohm");
}    
  ring=0;
}

Downloadable files

Pin details of 2.4 inch TFT LCD Shield

Fix the LCD Shield with Arduino UNO

Pin details of 2.4 inch TFT LCD Shield

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