Identification of Basic Logic Gate ICs using Arduino

1/*
2 
3  This sketch can identify NOT, AND, NAND, OR, NOR, and XOR
4  Gate ICs.
5  When a gate is connected and a button is pressed, Arduino identifies
6
7  the gate IC.
8 
9  This program is for LCD without I2C Module or without LCD
10
11  
12  This program is written by Shreyas for Electronics Champ YouTube Channel.
13
14  Please subscribe to this channel. Thank You.
15 
16*/
17 
18//Including the
19  libraries
20#include <LiquidCrystal.h>
21 
22const int rs = 12, en = 11, d4 =
23  10, d5 = 9, d6 = 8, d7 = 7;
24 
25//Define the variables
26int in1 = 3;
27int
28  in2 = 4;
29int out = 5;
30int button = 6;
31String gate = "";
32 
33//Create
34  LCD object
35LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
36 
37void setup() {
38
39  
40  //Start Serial communication
41  Serial.begin(9600);
42 
43  //Set pinModes
44
45  pinMode(in1, OUTPUT);
46  pinMode(in2, OUTPUT);
47  pinMode(button, INPUT);
48
49  pinMode(out, INPUT);
50 
51  //Initialize the lcd
52  lcd.begin(16, 2);
53
54  lcd.clear();
55  lcd.setCursor(0, 0);
56  lcd.print("Electronics");
57  lcd.setCursor(0,
58  1);
59  lcd.print("Champ");
60  Serial.println("Electronics Champ");
61  delay(3000);
62
63  lcd.clear();
64  lcd.setCursor(0, 0);
65  lcd.print("Place a Gate and");
66
67  lcd.setCursor(0, 1);
68  lcd.print("press the button");
69  Serial.println("Place
70  a Gate and press the button");
71 
72}
73 
74void loop() {
75 
76  if (digitalRead(button)
77  == HIGH) { //If the button is pressed...
78 
79    //Check if the gate is NOT
80  or NOR
81    checkNOT();
82    checkNOR();
83 
84    //If the gate is neither
85  NOR nor NOT, check for other gates
86    if (gate == "") {
87      digitalWrite(in1,
88  0);
89      digitalWrite(in2, 0);
90 
91      if (digitalRead(out) == 0) {
92
93        digitalWrite(in1, 0);
94        digitalWrite(in2, 1);
95 
96        if
97  (digitalRead(out) == 0) {
98          gate = "AND";
99        }
100 
101        else
102  if (digitalRead(out) == 1) {
103          digitalWrite(in1, 1);
104          digitalWrite(in2,
105  1);
106 
107          if (digitalRead(out) == 0) {
108            gate = "XOR";
109
110          }
111 
112          else {
113            gate = "OR";
114          }
115
116        }
117      }
118 
119      else if (digitalRead(out) == 1) {
120        gate
121  = "NAND";
122      }
123    }
124 
125    if (isGatePresent() == true) { //If
126  a gate IS PLACED AND the button is pressed...
127      lcd.clear();
128      lcd.setCursor(0,
129  0);
130      lcd.print("Gate: Logic ");
131      lcd.print(gate);
132      Serial.print("Gate:
133  Logic ");
134      Serial.print(gate);
135      Serial.println();
136      pinMode(in1,
137  OUTPUT);
138      pinMode(in2, INPUT);
139      digitalWrite(in1, 0);
140      delay(1000);
141
142      gate = "";
143    }
144 
145    else {
146      checkNOT();
147 
148      if
149  (gate != "NOT") {
150        Serial.println("Place a gate for classification!!");
151
152        lcd.clear();
153        lcd.setCursor(0, 0);
154        lcd.print("Place
155  a gate for");
156        lcd.setCursor(0, 1);
157        lcd.print("classification!!");
158
159        digitalWrite(in1, HIGH);
160        digitalWrite(in2, LOW);
161        gate
162  = "";
163        delay(2000);
164      }
165 
166      else if (gate == "NOT")
167  {
168        lcd.clear();
169        lcd.setCursor(0, 0);
170        lcd.print("Gate:
171  Logic ");
172        lcd.print("NOT");
173        Serial.print("Gate: Logic
174  ");
175        Serial.print("NOT");
176        Serial.println();
177        pinMode(in1,
178  OUTPUT);
179        pinMode(in2, INPUT);
180        digitalWrite(in1, 0);
181        delay(1000);
182
183        gate = "";
184      }
185 
186    }
187 
188  }
189 
190}
191 
192void
193  checkNOR() { //Check if the gate is NOR Gate
194 
195  pinMode(out, OUTPUT);
196
197  pinMode(in1, INPUT);
198  digitalWrite(out, 0);
199  digitalWrite(in2, 0);
200
201  
202  if (digitalRead(in1) == 1) {
203    digitalWrite(out, 0);
204    digitalWrite(in2,
205  1);
206 
207    if (digitalRead(in1) == 0) {
208      digitalWrite(out, 1);
209
210      digitalWrite(in2, 0);
211 
212      if (digitalRead(in1) == 0) {
213        digitalWrite(out,
214  1);
215        digitalWrite(in2, 1);
216 
217        if (digitalRead(in1) == 0)
218  {
219          gate = "NOR";
220        }
221      }
222    }
223  }
224 
225
226  pinMode(in1, OUTPUT);
227  pinMode(in2, OUTPUT);
228  pinMode(button, INPUT);
229
230  pinMode(out, INPUT);
231 
232}
233 
234void checkNOT() { //Check if the gate is
235  NOT Gate
236 
237  pinMode(in2, INPUT);
238  digitalWrite(in1, 0);
239 
240  if
241  (digitalRead(in2) == 1) {
242    digitalWrite(in1, 1);
243 
244    if (digitalRead(in2)
245  == 0) {
246      gate = "NOT";
247      pinMode(in1, OUTPUT);
248      pinMode(in2,
249  INPUT);
250    }
251  }
252 
253  pinMode(in2, OUTPUT);
254 
255}
256 
257boolean
258  isGatePresent() { //Check if a gate is placed
259 
260  digitalWrite(in1, 0);
261
262  digitalWrite(in2, 0);
263 
264  if (digitalRead(out) == 0) {
265    digitalWrite(in1,
266  0);
267    digitalWrite(in2, 1);
268 
269    if (digitalRead(out) == 0) {
270      digitalWrite(in1,
271  1);
272      digitalWrite(in2, 0);
273 
274      if (digitalRead(out) == 0) {
275
276        digitalWrite(in1, 1);
277        digitalWrite(in2, 1);
278 
279        if
280  (digitalRead(out) == 0) {
281          checkNOR();
282          checkNOT();
283
284  
285          if (gate != "NOR" and gate != "NOT") {
286            return false;
287
288          }
289 
290        }
291 
292        else {
293          return true;
294
295        }
296 
297      }
298 
299      else {
300        return true;
301      }
302
303  
304    }
305 
306    else {
307      return true;
308    }
309 
310  }
311 
312
313  else {
314    return true;
315  }
316 
317}
318

1/*
2 
3  This sketch can identify NOT, AND, NAND, OR, NOR, and XOR  Gate ICs.
4  When a gate is connected and a button is pressed, Arduino identifies
5  the gate IC.
6 
7  This program is for LCD without I2C Module or without LCD
8  
9  This program is written by Shreyas for Electronics Champ YouTube Channel.
10  Please subscribe to this channel. Thank You.
11 
12*/
13 
14//Including the  libraries
15#include <LiquidCrystal.h>
16 
17const int rs = 12, en = 11, d4 =  10, d5 = 9, d6 = 8, d7 = 7;
18 
19//Define the variables
20int in1 = 3;
21int  in2 = 4;
22int out = 5;
23int button = 6;
24String gate = "";
25 
26//Create  LCD object
27LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
28 
29void setup() {
30  
31  //Start Serial communication
32  Serial.begin(9600);
33 
34  //Set pinModes
35  pinMode(in1, OUTPUT);
36  pinMode(in2, OUTPUT);
37  pinMode(button, INPUT);
38  pinMode(out, INPUT);
39 
40  //Initialize the lcd
41  lcd.begin(16, 2);
42  lcd.clear();
43  lcd.setCursor(0, 0);
44  lcd.print("Electronics");
45  lcd.setCursor(0,  1);
46  lcd.print("Champ");
47  Serial.println("Electronics Champ");
48  delay(3000);
49  lcd.clear();
50  lcd.setCursor(0, 0);
51  lcd.print("Place a Gate and");
52  lcd.setCursor(0, 1);
53  lcd.print("press the button");
54  Serial.println("Place  a Gate and press the button");
55 
56}
57 
58void loop() {
59 
60  if (digitalRead(button)  == HIGH) { //If the button is pressed...
61 
62    //Check if the gate is NOT  or NOR
63    checkNOT();
64    checkNOR();
65 
66    //If the gate is neither  NOR nor NOT, check for other gates
67    if (gate == "") {
68      digitalWrite(in1,  0);
69      digitalWrite(in2, 0);
70 
71      if (digitalRead(out) == 0) {
72        digitalWrite(in1, 0);
73        digitalWrite(in2, 1);
74 
75        if  (digitalRead(out) == 0) {
76          gate = "AND";
77        }
78 
79        else  if (digitalRead(out) == 1) {
80          digitalWrite(in1, 1);
81          digitalWrite(in2,  1);
82 
83          if (digitalRead(out) == 0) {
84            gate = "XOR";
85          }
86 
87          else {
88            gate = "OR";
89          }
90        }
91      }
92 
93      else if (digitalRead(out) == 1) {
94        gate  = "NAND";
95      }
96    }
97 
98    if (isGatePresent() == true) { //If  a gate IS PLACED AND the button is pressed...
99      lcd.clear();
100      lcd.setCursor(0,  0);
101      lcd.print("Gate: Logic ");
102      lcd.print(gate);
103      Serial.print("Gate:  Logic ");
104      Serial.print(gate);
105      Serial.println();
106      pinMode(in1,  OUTPUT);
107      pinMode(in2, INPUT);
108      digitalWrite(in1, 0);
109      delay(1000);
110      gate = "";
111    }
112 
113    else {
114      checkNOT();
115 
116      if  (gate != "NOT") {
117        Serial.println("Place a gate for classification!!");
118        lcd.clear();
119        lcd.setCursor(0, 0);
120        lcd.print("Place  a gate for");
121        lcd.setCursor(0, 1);
122        lcd.print("classification!!");
123        digitalWrite(in1, HIGH);
124        digitalWrite(in2, LOW);
125        gate  = "";
126        delay(2000);
127      }
128 
129      else if (gate == "NOT")  {
130        lcd.clear();
131        lcd.setCursor(0, 0);
132        lcd.print("Gate:  Logic ");
133        lcd.print("NOT");
134        Serial.print("Gate: Logic  ");
135        Serial.print("NOT");
136        Serial.println();
137        pinMode(in1,  OUTPUT);
138        pinMode(in2, INPUT);
139        digitalWrite(in1, 0);
140        delay(1000);
141        gate = "";
142      }
143 
144    }
145 
146  }
147 
148}
149 
150void  checkNOR() { //Check if the gate is NOR Gate
151 
152  pinMode(out, OUTPUT);
153  pinMode(in1, INPUT);
154  digitalWrite(out, 0);
155  digitalWrite(in2, 0);
156  
157  if (digitalRead(in1) == 1) {
158    digitalWrite(out, 0);
159    digitalWrite(in2,  1);
160 
161    if (digitalRead(in1) == 0) {
162      digitalWrite(out, 1);
163      digitalWrite(in2, 0);
164 
165      if (digitalRead(in1) == 0) {
166        digitalWrite(out,  1);
167        digitalWrite(in2, 1);
168 
169        if (digitalRead(in1) == 0)  {
170          gate = "NOR";
171        }
172      }
173    }
174  }
175 
176  pinMode(in1, OUTPUT);
177  pinMode(in2, OUTPUT);
178  pinMode(button, INPUT);
179  pinMode(out, INPUT);
180 
181}
182 
183void checkNOT() { //Check if the gate is  NOT Gate
184 
185  pinMode(in2, INPUT);
186  digitalWrite(in1, 0);
187 
188  if  (digitalRead(in2) == 1) {
189    digitalWrite(in1, 1);
190 
191    if (digitalRead(in2)  == 0) {
192      gate = "NOT";
193      pinMode(in1, OUTPUT);
194      pinMode(in2,  INPUT);
195    }
196  }
197 
198  pinMode(in2, OUTPUT);
199 
200}
201 
202boolean  isGatePresent() { //Check if a gate is placed
203 
204  digitalWrite(in1, 0);
205  digitalWrite(in2, 0);
206 
207  if (digitalRead(out) == 0) {
208    digitalWrite(in1,  0);
209    digitalWrite(in2, 1);
210 
211    if (digitalRead(out) == 0) {
212      digitalWrite(in1,  1);
213      digitalWrite(in2, 0);
214 
215      if (digitalRead(out) == 0) {
216        digitalWrite(in1, 1);
217        digitalWrite(in2, 1);
218 
219        if  (digitalRead(out) == 0) {
220          checkNOR();
221          checkNOT();
222  
223          if (gate != "NOR" and gate != "NOT") {
224            return false;
225          }
226 
227        }
228 
229        else {
230          return true;
231        }
232 
233      }
234 
235      else {
236        return true;
237      }
238  
239    }
240 
241    else {
242      return true;
243    }
244 
245  }
246 
247  else {
248    return true;
249  }
250 
251}
252

1/*
2 
3  This sketch can identify NOT, AND, NAND, OR, NOR, and XOR  Gate ICs.
4  When a gate is connected and a button is pressed, Arduino identifies
5  the gate IC.
6 
7  This program is for LCD with I2C Module or without LCD
8  
9  This program is written by Shreyas for Electronics Champ YouTube Channel.
10  Please subscribe to this channel. Thank You.
11 
12*/
13 
14//Including the  libraries
15#include <Wire.h>
16#include <LiquidCrystal_I2C.h>
17 
18//Define  the variables
19int in1 = 3;
20int in2 = 4;
21int out = 5;
22int button = 6;
23String  gate = "";
24 
25//Create LCD_I2C object
26LiquidCrystal_I2C lcd(0x27, 16,  2);
27 
28void setup() {
29 
30  //Start Serial communication
31  Serial.begin(9600);
32  
33  //Set pinModes
34  pinMode(in1, OUTPUT);
35  pinMode(in2, OUTPUT);
36  pinMode(button,  INPUT);
37  pinMode(out, INPUT);
38 
39  //Initialize the lcd
40  lcd.init();
41  lcd.begin(16, 2);
42  lcd.clear();
43  lcd.backlight();
44  lcd.setCursor(0,  0);
45  lcd.print("Electronics");
46  lcd.setCursor(0, 1);
47  lcd.print("Champ");
48  Serial.println("Electronics Champ");
49  delay(3000);
50  lcd.clear();
51  lcd.setCursor(0, 0);
52  lcd.print("Place a Gate and");
53  lcd.setCursor(0,  1);
54  lcd.print("press the button");
55  Serial.println("Place a Gate and  press the button");
56 
57}
58 
59void loop() {
60 
61  if (digitalRead(button)  == HIGH) { //If the button is pressed...
62 
63    //Check if the gate is NOT  or NOR
64    checkNOT();
65    checkNOR();
66 
67    //If the gate is neither  NOR nor NOT, check for other gates
68    if (gate == "") {
69      digitalWrite(in1,  0);
70      digitalWrite(in2, 0);
71 
72      if (digitalRead(out) == 0) {
73        digitalWrite(in1, 0);
74        digitalWrite(in2, 1);
75 
76        if  (digitalRead(out) == 0) {
77          gate = "AND";
78        }
79 
80        else  if (digitalRead(out) == 1) {
81          digitalWrite(in1, 1);
82          digitalWrite(in2,  1);
83 
84          if (digitalRead(out) == 0) {
85            gate = "XOR";
86          }
87 
88          else {
89            gate = "OR";
90          }
91        }
92      }
93 
94      else if (digitalRead(out) == 1) {
95        gate  = "NAND";
96      }
97    }
98 
99    if (isGatePresent() == true) { //If  a gate IS PLACED AND the button is pressed...
100      lcd.clear();
101      lcd.setCursor(0,  0);
102      lcd.print("Gate: Logic ");
103      lcd.print(gate);
104      Serial.print("Gate:  Logic ");
105      Serial.print(gate);
106      Serial.println();
107      pinMode(in1,  OUTPUT);
108      pinMode(in2, INPUT);
109      digitalWrite(in1, 0);
110      delay(1000);
111      gate = "";
112    }
113 
114    else {
115      checkNOT();
116 
117      if  (gate != "NOT") {
118        Serial.println("Place a gate for classification!!");
119        lcd.clear();
120        lcd.setCursor(0, 0);
121        lcd.print("Place  a gate for");
122        lcd.setCursor(0, 1);
123        lcd.print("classification!!");
124        digitalWrite(in1, HIGH);
125        digitalWrite(in2, LOW);
126        gate  = "";
127        delay(2000);
128      }
129 
130      else if (gate == "NOT")  {
131        lcd.clear();
132        lcd.setCursor(0, 0);
133        lcd.print("Gate:  Logic ");
134        lcd.print("NOT");
135        Serial.print("Gate: Logic  ");
136        Serial.print("NOT");
137        Serial.println();
138        pinMode(in1,  OUTPUT);
139        pinMode(in2, INPUT);
140        digitalWrite(in1, 0);
141        delay(1000);
142        gate = "";
143      }
144 
145    }
146 
147  }
148 
149}
150 
151void  checkNOR() { //Check if the gate is NOR Gate
152 
153  pinMode(out, OUTPUT);
154  pinMode(in1, INPUT);
155  digitalWrite(out, 0);
156  digitalWrite(in2, 0);
157  
158  if (digitalRead(in1) == 1) {
159    digitalWrite(out, 0);
160    digitalWrite(in2,  1);
161 
162    if (digitalRead(in1) == 0) {
163      digitalWrite(out, 1);
164      digitalWrite(in2, 0);
165 
166      if (digitalRead(in1) == 0) {
167        digitalWrite(out,  1);
168        digitalWrite(in2, 1);
169 
170        if (digitalRead(in1) == 0)  {
171          gate = "NOR";
172        }
173      }
174    }
175  }
176 
177  pinMode(in1, OUTPUT);
178  pinMode(in2, OUTPUT);
179  pinMode(button, INPUT);
180  pinMode(out, INPUT);
181 
182}
183 
184void checkNOT() { //Check if the gate is  NOT Gate
185 
186  pinMode(in2, INPUT);
187  digitalWrite(in1, 0);
188 
189  if  (digitalRead(in2) == 1) {
190    digitalWrite(in1, 1);
191 
192    if (digitalRead(in2)  == 0) {
193      gate = "NOT";
194      pinMode(in1, OUTPUT);
195      pinMode(in2,  INPUT);
196    }
197  }
198 
199  pinMode(in2, OUTPUT);
200 
201}
202 
203boolean  isGatePresent() { //Check if a gate is placed
204 
205  digitalWrite(in1, 0);
206  digitalWrite(in2, 0);
207 
208  if (digitalRead(out) == 0) {
209    digitalWrite(in1,  0);
210    digitalWrite(in2, 1);
211 
212    if (digitalRead(out) == 0) {
213      digitalWrite(in1,  1);
214      digitalWrite(in2, 0);
215 
216      if (digitalRead(out) == 0) {
217        digitalWrite(in1, 1);
218        digitalWrite(in2, 1);
219 
220        if  (digitalRead(out) == 0) {
221          checkNOR();
222          checkNOT();
223  
224          if (gate != "NOR" and gate != "NOT") {
225            return false;
226          }
227 
228        }
229 
230        else {
231          return true;
232        }
233 
234      }
235 
236      else {
237        return true;
238      }
239  
240    }
241 
242    else {
243      return true;
244    }
245 
246  }
247 
248  else {
249    return true;
250  }
251 
252}
253