PDDU(Portable Distance Display Unit)

The PDDU uses HCSR04 sonar sensor to measure distance and print it on an 16:2 lcd screen. Using a battery makes the device portable.

Jun 10, 2020

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Data Collection

Environmental Sensing

Smart appliances

Components and supplies

Jumper wires (generic)

9V battery (generic)

Alphanumeric LCD, 16 x 2

Rotary Potentiometer, 10 kohm

Solderless Breadboard Full Size

Arduino UNO

9V to Barrel Jack Connector

Ultrasonic Sensor - HC-SR04 (Generic)

Apps and platforms

Arduino IDE

Windows 10

Project description

Code

PDDU code

c_cpp

Upload code onto arduino ide and upload again on arduino uno

1#include<LiquidCrystal.h>
2const int rs=12, en=11, d4=5, d5=4, d6=3,   d7=2;
3LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
4#include<HCSR04.h>
5const   int Triggerpin=8;
6const int EchoPin=9;
7long Duration=0;
8void setup() {
9   lcd.begin(16,2);
10  pinMode(Triggerpin,OUTPUT);
11  pinMode(EchoPin,INPUT);
12}
13void   loop() {
14  lcd.noDisplay();
15  lcd.setCursor(0,0);
16  digitalWrite(Triggerpin,LOW);
17   delayMicroseconds(2);
18  digitalWrite(Triggerpin,HIGH);
19  delayMicroseconds(10);
20   digitalWrite(Triggerpin,LOW);
21  Duration=pulseIn(EchoPin,HIGH);
22  long Distance_cm=Distance(Duration);
23   lcd.print("Distance= ");
24  lcd.setCursor(10,0);
25  lcd.print(Distance_cm);
26   lcd.print("cm");
27  lcd.display();
28  delay(1000);
29  lcd.noDisplay();
30   lcd.setCursor(0,1);
31  digitalWrite(Triggerpin,LOW);
32  delayMicroseconds(2);
33   digitalWrite(Triggerpin,HIGH);
34  delayMicroseconds(10);
35  digitalWrite(Triggerpin,LOW);
36   Duration=pulseIn(EchoPin,HIGH);
37  long Distancem_m=Distancem(Duration);
38   lcd.print("Distance= ");
39  lcd.setCursor(10,1);
40  lcd.print(Distancem_m);
41   lcd.print("m");
42  lcd.display();
43  delay(3000);
44  lcd.clear();
45   }
46long Distance(long time){
47  long DistanceCalc;
48  DistanceCalc=((time*0.0343)/2);
49   return DistanceCalc; }
50long Distancem(long time){
51  long DistancemCalc;
52   DistancemCalc=((time/2915.452)/2);
53  return DistancemCalc;
54}

#include<LiquidCrystal.h>
const int rs=12, en=11, d4=5, d5=4, d6=3,   d7=2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
#include<HCSR04.h>
const   int Triggerpin=8;
const int EchoPin=9;
long Duration=0;
void setup() {
   lcd.begin(16,2);
  pinMode(Triggerpin,OUTPUT);
  pinMode(EchoPin,INPUT);
}
void   loop() {
  lcd.noDisplay();
  lcd.setCursor(0,0);
  digitalWrite(Triggerpin,LOW);
   delayMicroseconds(2);
  digitalWrite(Triggerpin,HIGH);
  delayMicroseconds(10);
   digitalWrite(Triggerpin,LOW);
  Duration=pulseIn(EchoPin,HIGH);
  long Distance_cm=Distance(Duration);
   lcd.print("Distance= ");
  lcd.setCursor(10,0);
  lcd.print(Distance_cm);
   lcd.print("cm");
  lcd.display();
  delay(1000);
  lcd.noDisplay();
   lcd.setCursor(0,1);
  digitalWrite(Triggerpin,LOW);
  delayMicroseconds(2);
   digitalWrite(Triggerpin,HIGH);
  delayMicroseconds(10);
  digitalWrite(Triggerpin,LOW);
   Duration=pulseIn(EchoPin,HIGH);
  long Distancem_m=Distancem(Duration);
   lcd.print("Distance= ");
  lcd.setCursor(10,1);
  lcd.print(Distancem_m);
   lcd.print("m");
  lcd.display();
  delay(3000);
  lcd.clear();
   }
long Distance(long time){
  long DistanceCalc;
  DistanceCalc=((time*0.0343)/2);
   return DistanceCalc; }
long Distancem(long time){
  long DistancemCalc;
   DistancemCalc=((time/2915.452)/2);
  return DistancemCalc;
}

PDDU code

c_cpp

Upload code onto arduino ide and upload again on arduino uno

1#include<LiquidCrystal.h>
2const int rs=12, en=11, d4=5, d5=4, d6=3,  d7=2;
3LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
4#include<HCSR04.h>
5const  int Triggerpin=8;
6const int EchoPin=9;
7long Duration=0;
8void setup() {
9  lcd.begin(16,2);
10  pinMode(Triggerpin,OUTPUT);
11  pinMode(EchoPin,INPUT);
12}
13void  loop() {
14  lcd.noDisplay();
15  lcd.setCursor(0,0);
16  digitalWrite(Triggerpin,LOW);
17  delayMicroseconds(2);
18  digitalWrite(Triggerpin,HIGH);
19  delayMicroseconds(10);
20  digitalWrite(Triggerpin,LOW);
21  Duration=pulseIn(EchoPin,HIGH);
22  long Distance_cm=Distance(Duration);
23  lcd.print("Distance= ");
24  lcd.setCursor(10,0);
25  lcd.print(Distance_cm);
26  lcd.print("cm");
27  lcd.display();
28  delay(1000);
29  lcd.noDisplay();
30  lcd.setCursor(0,1);
31  digitalWrite(Triggerpin,LOW);
32  delayMicroseconds(2);
33  digitalWrite(Triggerpin,HIGH);
34  delayMicroseconds(10);
35  digitalWrite(Triggerpin,LOW);
36  Duration=pulseIn(EchoPin,HIGH);
37  long Distancem_m=Distancem(Duration);
38  lcd.print("Distance= ");
39  lcd.setCursor(10,1);
40  lcd.print(Distancem_m);
41  lcd.print("m");
42  lcd.display();
43  delay(3000);
44  lcd.clear();
45  }
46long Distance(long time){
47  long DistanceCalc;
48  DistanceCalc=((time*0.0343)/2);
49  return DistanceCalc; }
50long Distancem(long time){
51  long DistancemCalc;
52  DistancemCalc=((time/2915.452)/2);
53  return DistancemCalc;
54}

#include<LiquidCrystal.h>
const int rs=12, en=11, d4=5, d5=4, d6=3,  d7=2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
#include<HCSR04.h>
const  int Triggerpin=8;
const int EchoPin=9;
long Duration=0;
void setup() {
  lcd.begin(16,2);
  pinMode(Triggerpin,OUTPUT);
  pinMode(EchoPin,INPUT);
}
void  loop() {
  lcd.noDisplay();
  lcd.setCursor(0,0);
  digitalWrite(Triggerpin,LOW);
  delayMicroseconds(2);
  digitalWrite(Triggerpin,HIGH);
  delayMicroseconds(10);
  digitalWrite(Triggerpin,LOW);
  Duration=pulseIn(EchoPin,HIGH);
  long Distance_cm=Distance(Duration);
  lcd.print("Distance= ");
  lcd.setCursor(10,0);
  lcd.print(Distance_cm);
  lcd.print("cm");
  lcd.display();
  delay(1000);
  lcd.noDisplay();
  lcd.setCursor(0,1);
  digitalWrite(Triggerpin,LOW);
  delayMicroseconds(2);
  digitalWrite(Triggerpin,HIGH);
  delayMicroseconds(10);
  digitalWrite(Triggerpin,LOW);
  Duration=pulseIn(EchoPin,HIGH);
  long Distancem_m=Distancem(Duration);
  lcd.print("Distance= ");
  lcd.setCursor(10,1);
  lcd.print(Distancem_m);
  lcd.print("m");
  lcd.display();
  delay(3000);
  lcd.clear();
  }
long Distance(long time){
  long DistanceCalc;
  DistanceCalc=((time*0.0343)/2);
  return DistanceCalc; }
long Distancem(long time){
  long DistancemCalc;
  DistancemCalc=((time/2915.452)/2);
  return DistancemCalc;
}

Downloadable files

PDDU circuit diagram and schematic

This is wiring and schematic used to creat PDDU wiring

PDDU circuit diagram and schematic

PDDU schematic

PDDU circuit diagram and schematic

This is wiring and schematic used to creat PDDU wiring

PDDU circuit diagram and schematic

PDDU schematic

PDDU circuit diagram

use the ciruit diagram for wiring

PDDU circuit diagram

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