TMP36 and 4-digit 7-segment display

1/* Using the TMP36 sensor to take temperature readings,
2   display   it on the 4 digit 7 segment.
3
4   Components:
5                - Arduino   Uno
6                - TMP36 temperature sensor
7                - 4 digit 7   segment display
8                - 1kOhm resistor (x 4)
9
10   Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/TMP35_36_37.pdf
11
12    Created on 10 June 2022 by c010rblind3ngineer
13*/
14
15int pinA = 11;
16int   pinB = 7;
17int pinC = 4;
18int pinD = 2;
19int pinE = 1;
20int pinF = 10;
21int   pinG = 5;
22int pinDP = 3;
23
24int D1 = 12;
25int D2 = 9;
26int D3 = 8;
27int   D4 = 6;
28
29int sensorPin = 0;
30float supplyVoltage = 5;
31
32void setup()   {
33  // put your setup code here, to run once:
34  pinMode(pinA, OUTPUT);  //11
35   pinMode(pinB, OUTPUT);  //7
36  pinMode(pinC, OUTPUT);  //4
37  pinMode(pinD,   OUTPUT);  //2
38  pinMode(pinE, OUTPUT);  //1
39  pinMode(pinF, OUTPUT);  //10
40   pinMode(pinG, OUTPUT);  //5
41  pinMode(D1, OUTPUT);    //12
42  pinMode(D2,   OUTPUT);    //9
43  pinMode(D3, OUTPUT);    //8
44  pinMode(D4, OUTPUT);    //6
45
46}
47
48void   loop() {
49  // get voltage reading from TMP36
50  int reading = analogRead(sensorPin);
51
52   // convert the reading to voltage
53  float voltage = reading * supplyVoltage   / 1024;
54
55  // convert voltage to temperature
56  float tempC = (voltage -   0.5) * 100; // we need to convert from 10mV per degreee with 0.5V offset
57
58   // display temperature digits on 4 digit 7 segment display
59  int tempd1 = int(tempC   / 10);
60  int tempd2 = int((int)tempC % 10);
61
62  // 'for' loop ensures the   display is constantly ON within a period of time (approx. 10s)...
63  // ...before   sensor takes another reading.
64  // Temperature reading
65  for (int i = 0; i   < 2000; i++) {
66    digitalWrite(D1, LOW);
67    digitalWrite(D2, HIGH);
68     digitalWrite(D3, HIGH);
69    digitalWrite(D4, HIGH);
70    disp(tempd1);
71     delay(1);
72
73    digitalWrite(D1, HIGH);
74    digitalWrite(D2, LOW);
75     digitalWrite(D3, HIGH);
76    digitalWrite(D4, HIGH);
77    disp(tempd2);
78     delay(1);
79
80    digitalWrite(D1, HIGH);
81    digitalWrite(D2, HIGH);
82     digitalWrite(D3, LOW);
83    digitalWrite(D4, HIGH);
84    disp(11);
85    delay(1);
86
87     digitalWrite(D1, HIGH);
88    digitalWrite(D2, HIGH);
89    digitalWrite(D3,   HIGH);
90    digitalWrite(D4, LOW);
91    disp(10);
92    delay(1);
93  }
94   displayoff();
95  delay(1000);
96
97}
98
99void disp(int number) {
100
101   switch (number) {
102    case 0 : // display '0' on 7 segment
103      digitalWrite(pinA,   HIGH);
104      digitalWrite(pinB, HIGH);
105      digitalWrite(pinC, HIGH);
106       digitalWrite(pinD, HIGH);
107      digitalWrite(pinE, HIGH);
108      digitalWrite(pinF,   HIGH);
109      digitalWrite(pinG, LOW);
110      break;
111
112    case 1 : //   display '1' on 7 segment
113      digitalWrite(pinA, LOW);
114      digitalWrite(pinB,   HIGH);
115      digitalWrite(pinC, HIGH);
116      digitalWrite(pinD, LOW);
117       digitalWrite(pinE, LOW);
118      digitalWrite(pinF, LOW);
119      digitalWrite(pinG,   LOW);
120      break;
121
122    case 2 : // display '2' on 7 segment
123      digitalWrite(pinA,   HIGH);
124      digitalWrite(pinB, HIGH);
125      digitalWrite(pinC, LOW);
126       digitalWrite(pinD, HIGH);
127      digitalWrite(pinE, HIGH);
128      digitalWrite(pinF,   LOW);
129      digitalWrite(pinG, HIGH);
130      break;
131
132    case 3 : //   display '3' on 7 segment
133      digitalWrite(pinA, HIGH);
134      digitalWrite(pinB,   HIGH);
135      digitalWrite(pinC, HIGH);
136      digitalWrite(pinD, HIGH);
137       digitalWrite(pinE, LOW);
138      digitalWrite(pinF, LOW);
139      digitalWrite(pinG,   HIGH);
140      break;
141
142    case 4 : // display '4' on 7 segment
143      digitalWrite(pinA,   LOW);
144      digitalWrite(pinB, HIGH);
145      digitalWrite(pinC, HIGH);
146       digitalWrite(pinD, LOW);
147      digitalWrite(pinE, LOW);
148      digitalWrite(pinF,   HIGH);
149      digitalWrite(pinG, HIGH);
150      break;
151
152    case 5 : //   display '5' on 7 segment
153      digitalWrite(pinA, HIGH);
154      digitalWrite(pinB,   LOW);
155      digitalWrite(pinC, HIGH);
156      digitalWrite(pinD, HIGH);
157       digitalWrite(pinE, LOW);
158      digitalWrite(pinF, HIGH);
159      digitalWrite(pinG,   HIGH);
160      break;
161
162    case 6 : // display '6' on 7 segment
163      digitalWrite(pinA,   HIGH);
164      digitalWrite(pinB, LOW);
165      digitalWrite(pinC, HIGH);
166       digitalWrite(pinD, HIGH);
167      digitalWrite(pinE, HIGH);
168      digitalWrite(pinF,   HIGH);
169      digitalWrite(pinG, HIGH);
170      break;
171
172    case 7 : //   display '7' on 7 segment
173      digitalWrite(pinA, HIGH);
174      digitalWrite(pinB,   HIGH);
175      digitalWrite(pinC, HIGH);
176      digitalWrite(pinD, LOW);
177       digitalWrite(pinE, LOW);
178      digitalWrite(pinF, LOW);
179      digitalWrite(pinG,   LOW);
180      break;
181
182    case 8 : // display '8' on 7 segment
183      digitalWrite(pinA,   HIGH);
184      digitalWrite(pinB, HIGH);
185      digitalWrite(pinC, HIGH);
186       digitalWrite(pinD, HIGH);
187      digitalWrite(pinE, HIGH);
188      digitalWrite(pinF,   HIGH);
189      digitalWrite(pinG, HIGH);
190      break;
191
192    case 9 : //   display '9' on 7 segment
193      digitalWrite(pinA, HIGH);
194      digitalWrite(pinB,   HIGH);
195      digitalWrite(pinC, HIGH);
196      digitalWrite(pinD, LOW);
197       digitalWrite(pinE, LOW);
198      digitalWrite(pinF, HIGH);
199      digitalWrite(pinG,   HIGH);
200      break;
201
202    case 10 :  // display 'C' on 7 segment
203      digitalWrite(pinA,   HIGH);
204      digitalWrite(pinB, LOW);
205      digitalWrite(pinC, LOW);
206      digitalWrite(pinD,   HIGH);
207      digitalWrite(pinE, HIGH);
208      digitalWrite(pinF, HIGH);
209       digitalWrite(pinG, LOW);
210      break;
211
212    case 11 :  // display   'o' on 7 segment
213      digitalWrite(pinA, HIGH);
214      digitalWrite(pinB,   HIGH);
215      digitalWrite(pinC, LOW);
216      digitalWrite(pinD, LOW);
217      digitalWrite(pinE,   LOW);
218      digitalWrite(pinF, HIGH);
219      digitalWrite(pinG, HIGH);
220       break;
221  }
222}
223
224void displayoff() {
225  digitalWrite(D1, HIGH);
226   digitalWrite(D2, HIGH);
227  digitalWrite(D3, HIGH);
228  digitalWrite(D4, HIGH);
229}
230

1/* Using the TMP36 sensor to take temperature readings,
2   display  it on the 4 digit 7 segment.
3
4   Components:
5                - Arduino  Uno
6                - TMP36 temperature sensor
7                - 4 digit 7  segment display
8                - 1kOhm resistor (x 4)
9
10   Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/TMP35_36_37.pdf
11
12   Created on 10 June 2022 by c010rblind3ngineer
13*/
14
15int pinA = 11;
16int  pinB = 7;
17int pinC = 4;
18int pinD = 2;
19int pinE = 1;
20int pinF = 10;
21int  pinG = 5;
22int pinDP = 3;
23
24int D1 = 12;
25int D2 = 9;
26int D3 = 8;
27int  D4 = 6;
28
29int sensorPin = 0;
30float supplyVoltage = 5;
31
32void setup()  {
33  // put your setup code here, to run once:
34  pinMode(pinA, OUTPUT);  //11
35  pinMode(pinB, OUTPUT);  //7
36  pinMode(pinC, OUTPUT);  //4
37  pinMode(pinD,  OUTPUT);  //2
38  pinMode(pinE, OUTPUT);  //1
39  pinMode(pinF, OUTPUT);  //10
40  pinMode(pinG, OUTPUT);  //5
41  pinMode(D1, OUTPUT);    //12
42  pinMode(D2,  OUTPUT);    //9
43  pinMode(D3, OUTPUT);    //8
44  pinMode(D4, OUTPUT);    //6
45
46}
47
48void  loop() {
49  // get voltage reading from TMP36
50  int reading = analogRead(sensorPin);
51
52  // convert the reading to voltage
53  float voltage = reading * supplyVoltage  / 1024;
54
55  // convert voltage to temperature
56  float tempC = (voltage -  0.5) * 100; // we need to convert from 10mV per degreee with 0.5V offset
57
58  // display temperature digits on 4 digit 7 segment display
59  int tempd1 = int(tempC  / 10);
60  int tempd2 = int((int)tempC % 10);
61
62  // 'for' loop ensures the  display is constantly ON within a period of time (approx. 10s)...
63  // ...before  sensor takes another reading.
64  // Temperature reading
65  for (int i = 0; i  < 2000; i++) {
66    digitalWrite(D1, LOW);
67    digitalWrite(D2, HIGH);
68    digitalWrite(D3, HIGH);
69    digitalWrite(D4, HIGH);
70    disp(tempd1);
71    delay(1);
72
73    digitalWrite(D1, HIGH);
74    digitalWrite(D2, LOW);
75    digitalWrite(D3, HIGH);
76    digitalWrite(D4, HIGH);
77    disp(tempd2);
78    delay(1);
79
80    digitalWrite(D1, HIGH);
81    digitalWrite(D2, HIGH);
82    digitalWrite(D3, LOW);
83    digitalWrite(D4, HIGH);
84    disp(11);
85    delay(1);
86
87    digitalWrite(D1, HIGH);
88    digitalWrite(D2, HIGH);
89    digitalWrite(D3,  HIGH);
90    digitalWrite(D4, LOW);
91    disp(10);
92    delay(1);
93  }
94  displayoff();
95  delay(1000);
96
97}
98
99void disp(int number) {
100
101  switch (number) {
102    case 0 : // display '0' on 7 segment
103      digitalWrite(pinA,  HIGH);
104      digitalWrite(pinB, HIGH);
105      digitalWrite(pinC, HIGH);
106      digitalWrite(pinD, HIGH);
107      digitalWrite(pinE, HIGH);
108      digitalWrite(pinF,  HIGH);
109      digitalWrite(pinG, LOW);
110      break;
111
112    case 1 : //  display '1' on 7 segment
113      digitalWrite(pinA, LOW);
114      digitalWrite(pinB,  HIGH);
115      digitalWrite(pinC, HIGH);
116      digitalWrite(pinD, LOW);
117      digitalWrite(pinE, LOW);
118      digitalWrite(pinF, LOW);
119      digitalWrite(pinG,  LOW);
120      break;
121
122    case 2 : // display '2' on 7 segment
123      digitalWrite(pinA,  HIGH);
124      digitalWrite(pinB, HIGH);
125      digitalWrite(pinC, LOW);
126      digitalWrite(pinD, HIGH);
127      digitalWrite(pinE, HIGH);
128      digitalWrite(pinF,  LOW);
129      digitalWrite(pinG, HIGH);
130      break;
131
132    case 3 : //  display '3' on 7 segment
133      digitalWrite(pinA, HIGH);
134      digitalWrite(pinB,  HIGH);
135      digitalWrite(pinC, HIGH);
136      digitalWrite(pinD, HIGH);
137      digitalWrite(pinE, LOW);
138      digitalWrite(pinF, LOW);
139      digitalWrite(pinG,  HIGH);
140      break;
141
142    case 4 : // display '4' on 7 segment
143      digitalWrite(pinA,  LOW);
144      digitalWrite(pinB, HIGH);
145      digitalWrite(pinC, HIGH);
146      digitalWrite(pinD, LOW);
147      digitalWrite(pinE, LOW);
148      digitalWrite(pinF,  HIGH);
149      digitalWrite(pinG, HIGH);
150      break;
151
152    case 5 : //  display '5' on 7 segment
153      digitalWrite(pinA, HIGH);
154      digitalWrite(pinB,  LOW);
155      digitalWrite(pinC, HIGH);
156      digitalWrite(pinD, HIGH);
157      digitalWrite(pinE, LOW);
158      digitalWrite(pinF, HIGH);
159      digitalWrite(pinG,  HIGH);
160      break;
161
162    case 6 : // display '6' on 7 segment
163      digitalWrite(pinA,  HIGH);
164      digitalWrite(pinB, LOW);
165      digitalWrite(pinC, HIGH);
166      digitalWrite(pinD, HIGH);
167      digitalWrite(pinE, HIGH);
168      digitalWrite(pinF,  HIGH);
169      digitalWrite(pinG, HIGH);
170      break;
171
172    case 7 : //  display '7' on 7 segment
173      digitalWrite(pinA, HIGH);
174      digitalWrite(pinB,  HIGH);
175      digitalWrite(pinC, HIGH);
176      digitalWrite(pinD, LOW);
177      digitalWrite(pinE, LOW);
178      digitalWrite(pinF, LOW);
179      digitalWrite(pinG,  LOW);
180      break;
181
182    case 8 : // display '8' on 7 segment
183      digitalWrite(pinA,  HIGH);
184      digitalWrite(pinB, HIGH);
185      digitalWrite(pinC, HIGH);
186      digitalWrite(pinD, HIGH);
187      digitalWrite(pinE, HIGH);
188      digitalWrite(pinF,  HIGH);
189      digitalWrite(pinG, HIGH);
190      break;
191
192    case 9 : //  display '9' on 7 segment
193      digitalWrite(pinA, HIGH);
194      digitalWrite(pinB,  HIGH);
195      digitalWrite(pinC, HIGH);
196      digitalWrite(pinD, LOW);
197      digitalWrite(pinE, LOW);
198      digitalWrite(pinF, HIGH);
199      digitalWrite(pinG,  HIGH);
200      break;
201
202    case 10 :  // display 'C' on 7 segment
203      digitalWrite(pinA,  HIGH);
204      digitalWrite(pinB, LOW);
205      digitalWrite(pinC, LOW);
206      digitalWrite(pinD,  HIGH);
207      digitalWrite(pinE, HIGH);
208      digitalWrite(pinF, HIGH);
209      digitalWrite(pinG, LOW);
210      break;
211
212    case 11 :  // display  'o' on 7 segment
213      digitalWrite(pinA, HIGH);
214      digitalWrite(pinB,  HIGH);
215      digitalWrite(pinC, LOW);
216      digitalWrite(pinD, LOW);
217      digitalWrite(pinE,  LOW);
218      digitalWrite(pinF, HIGH);
219      digitalWrite(pinG, HIGH);
220      break;
221  }
222}
223
224void displayoff() {
225  digitalWrite(D1, HIGH);
226  digitalWrite(D2, HIGH);
227  digitalWrite(D3, HIGH);
228  digitalWrite(D4, HIGH);
229}
230