Digital Meter

1//by t.vajed
2
3#include <LiquidCrystal.h>
4int echoPin=5;
5int  pingPin=6;
6// initialize the library with the numbers of the interface pins
7LiquidCrystal  lcd(12, 11, 10, 9, 8, 7);
8
9void setup() {
10  // set up the LCD's number  of columns and rows:
11  lcd.begin(16, 2);
12  // Print a message to the LCD.
13  lcd.clear();
14  delay(150);
15  lcd.print("digital, meter");
16  delay(2500);
17  lcd.clear();
18  delay(150);
19  pinMode(pingPin, OUTPUT);
20  pinMode(echoPin,  INPUT);
21  pinMode(A0,INPUT_PULLUP);
22  pinMode(A1,INPUT_PULLUP);
23}
24
25void  loop() {
26//srf05 works in two mode in this project, first capture
27   while(digitalRead(A0)==0){
28    lcd.clear();
29    lcd.print("capture mode");
30    delay(200);
31    if(digitalRead(A1)==0){
32     //srf starts working 
33     digitalWrite(pingPin, 0);
34     delayMicroseconds(5);
35     digitalWrite(pingPin, 1);
36     delayMicroseconds(5);
37     digitalWrite(pingPin,  0);
38     int duration=pulseIn(echoPin, HIGH);
39     lcd.clear();
40     lcd.print(duration/58);
41     lcd.print(" cm");
42     lcd.setCursor(0,1);
43     lcd.print(duration/74/2);
44     lcd.print(" in");
45     delay(3500);
46    }
47  }
48  //scanning mode  of srf
49   digitalWrite(pingPin, 0);
50   delayMicroseconds(5);
51   digitalWrite(pingPin,  1);
52   delayMicroseconds(5);
53   digitalWrite(pingPin, 0);
54   int duration=pulseIn(echoPin,  HIGH);
55   lcd.print(duration/58);
56   lcd.print(" cm");
57   lcd.setCursor(0,1);
58   lcd.print(duration/74/2);
59   lcd.print(" in");
60   delay(1000);
61   lcd.clear();
62}
63
64

1//by t.vajed
2
3#include <LiquidCrystal.h>
4int echoPin=5;
5int
6  pingPin=6;
7// initialize the library with the numbers of the interface pins
8LiquidCrystal
9  lcd(12, 11, 10, 9, 8, 7);
10
11void setup() {
12  // set up the LCD's number
13  of columns and rows:
14  lcd.begin(16, 2);
15  // Print a message to the LCD.
16
17  lcd.clear();
18  delay(150);
19  lcd.print("digital, meter");
20  delay(2500);
21
22  lcd.clear();
23  delay(150);
24  pinMode(pingPin, OUTPUT);
25  pinMode(echoPin,
26  INPUT);
27  pinMode(A0,INPUT_PULLUP);
28  pinMode(A1,INPUT_PULLUP);
29}
30
31void
32  loop() {
33//srf05 works in two mode in this project, first capture
34   while(digitalRead(A0)==0){
35
36    lcd.clear();
37    lcd.print("capture mode");
38    delay(200);
39    if(digitalRead(A1)==0){
40
41     //srf starts working 
42     digitalWrite(pingPin, 0);
43     delayMicroseconds(5);
44
45     digitalWrite(pingPin, 1);
46     delayMicroseconds(5);
47     digitalWrite(pingPin,
48  0);
49     int duration=pulseIn(echoPin, HIGH);
50     lcd.clear();
51     lcd.print(duration/58);
52
53     lcd.print(" cm");
54     lcd.setCursor(0,1);
55     lcd.print(duration/74/2);
56
57     lcd.print(" in");
58     delay(3500);
59    }
60  }
61  //scanning mode
62  of srf
63   digitalWrite(pingPin, 0);
64   delayMicroseconds(5);
65   digitalWrite(pingPin,
66  1);
67   delayMicroseconds(5);
68   digitalWrite(pingPin, 0);
69   int duration=pulseIn(echoPin,
70  HIGH);
71   lcd.print(duration/58);
72   lcd.print(" cm");
73   lcd.setCursor(0,1);
74
75   lcd.print(duration/74/2);
76   lcd.print(" in");
77   delay(1000);
78   lcd.clear();
79}
80
81