Motion Sensor Stopwatch

Measure the speed of an object with the motion sensor stopwatch.

Mar 20, 2021

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2 respects

Components and supplies

Alphanumeric LCD, 16 x 2

Servo Module (Generic)

Elegoo Ultrasonic Sensor

Solderless Breadboard Full Size

Switch Sealing Boot, Button Operators

Arduino Mega 2560

Apps and platforms

Arduino IDE

Project description

Code

StopwatchSensor.ino

arduino

1#include <LiquidCrystal.h>
2#include <Servo.h>
3
4LiquidCrystal   lcd(12, 11, 5, 4, 3, 2);
5Servo releaseGate;
6
7const int distancePingPin   = 9;
8const int distanceEchoPin = 10;
9const int buttonPin = 6;  
10const int   servoPin = 7;  
11const int detectionDistance = 10;
12unsigned long startTime;
13unsigned   long currentTime;
14bool timerStop = false;
15int closedAngle = 70;
16int openAngle   = 170;
17
18void setup() {
19  Serial.begin(9600);
20
21  releaseGate.attach(servoPin);
22
23   pinMode(buttonPin, INPUT);
24  
25  lcd.begin(16, 2);
26  startTime = 0;
27   StartClock();
28}
29
30void loop() 
31{
32  currentTime = millis();
33  
34   int distance = DistanceToObstacle();
35
36  if (distance <= detectionDistance)
37   {
38    if (timerStop == false)
39    {
40    lcd.clear();
41    delay(100);
42     float currentT = currentTime;
43    float startT = startTime;
44    if ((currentT   - startT) /1000 > 60)
45    {
46          lcd.print(((currentT - startT) /1000)   / 60);
47          lcd.print(" Minutes");
48    }
49    else
50    {
51          lcd.print((currentT   - startT) /1000);
52          lcd.print(" Seconds");
53    }
54    timerStop   = true;
55    }
56  }
57
58  if(digitalRead(buttonPin) == HIGH)
59  {
60    StartClock();
61   }
62}
63
64void StartClock()
65{
66    releaseGate.write(openAngle);
67     timerStop = false;
68    startTime = millis();
69    lcd.clear();
70    delay(100);
71     lcd.print("Clock Started");
72    delay(500); 
73    releaseGate.write(closedAngle);
74}
75
76float   DistanceToObstacle()
77{
78   delay(100);
79   long duration, inches, cm;
80    pinMode(distancePingPin, OUTPUT);
81   digitalWrite(distancePingPin, LOW);
82    delayMicroseconds(2);
83   digitalWrite(distancePingPin, HIGH);
84   delayMicroseconds(10);
85    digitalWrite(distancePingPin, LOW);
86   pinMode(distanceEchoPin, INPUT);
87    duration = pulseIn(distanceEchoPin, HIGH);
88   cm = MicrosecondsToCentimeters(duration);
89    return cm;
90}
91
92long MicrosecondsToCentimeters(long microseconds) {
93    return microseconds / 29 / 2;
94}
95

#include <LiquidCrystal.h>
#include <Servo.h>

LiquidCrystal   lcd(12, 11, 5, 4, 3, 2);
Servo releaseGate;

const int distancePingPin   = 9;
const int distanceEchoPin = 10;
const int buttonPin = 6;  
const int   servoPin = 7;  
const int detectionDistance = 10;
unsigned long startTime;
unsigned   long currentTime;
bool timerStop = false;
int closedAngle = 70;
int openAngle   = 170;

void setup() {
  Serial.begin(9600);

  releaseGate.attach(servoPin);

   pinMode(buttonPin, INPUT);
  
  lcd.begin(16, 2);
  startTime = 0;
   StartClock();
}

void loop() 
{
  currentTime = millis();
  
   int distance = DistanceToObstacle();

  if (distance <= detectionDistance)
   {
    if (timerStop == false)
    {
    lcd.clear();
    delay(100);
     float currentT = currentTime;
    float startT = startTime;
    if ((currentT   - startT) /1000 > 60)
    {
          lcd.print(((currentT - startT) /1000)   / 60);
          lcd.print(" Minutes");
    }
    else
    {
          lcd.print((currentT   - startT) /1000);
          lcd.print(" Seconds");
    }
    timerStop   = true;
    }
  }

  if(digitalRead(buttonPin) == HIGH)
  {
    StartClock();
   }
}

void StartClock()
{
    releaseGate.write(openAngle);
     timerStop = false;
    startTime = millis();
    lcd.clear();
    delay(100);
     lcd.print("Clock Started");
    delay(500); 
    releaseGate.write(closedAngle);
}

float   DistanceToObstacle()
{
   delay(100);
   long duration, inches, cm;
    pinMode(distancePingPin, OUTPUT);
   digitalWrite(distancePingPin, LOW);
    delayMicroseconds(2);
   digitalWrite(distancePingPin, HIGH);
   delayMicroseconds(10);
    digitalWrite(distancePingPin, LOW);
   pinMode(distanceEchoPin, INPUT);
    duration = pulseIn(distanceEchoPin, HIGH);
   cm = MicrosecondsToCentimeters(duration);
    return cm;
}

long MicrosecondsToCentimeters(long microseconds) {
    return microseconds / 29 / 2;
}

StopwatchSensor.ino

arduino

1#include <LiquidCrystal.h>
2#include <Servo.h>
3
4LiquidCrystal  lcd(12, 11, 5, 4, 3, 2);
5Servo releaseGate;
6
7const int distancePingPin  = 9;
8const int distanceEchoPin = 10;
9const int buttonPin = 6;  
10const int  servoPin = 7;  
11const int detectionDistance = 10;
12unsigned long startTime;
13unsigned  long currentTime;
14bool timerStop = false;
15int closedAngle = 70;
16int openAngle  = 170;
17
18void setup() {
19  Serial.begin(9600);
20
21  releaseGate.attach(servoPin);
22
23  pinMode(buttonPin, INPUT);
24  
25  lcd.begin(16, 2);
26  startTime = 0;
27  StartClock();
28}
29
30void loop() 
31{
32  currentTime = millis();
33  
34  int distance = DistanceToObstacle();
35
36  if (distance <= detectionDistance)
37  {
38    if (timerStop == false)
39    {
40    lcd.clear();
41    delay(100);
42    float currentT = currentTime;
43    float startT = startTime;
44    if ((currentT  - startT) /1000 > 60)
45    {
46          lcd.print(((currentT - startT) /1000)  / 60);
47          lcd.print(" Minutes");
48    }
49    else
50    {
51          lcd.print((currentT  - startT) /1000);
52          lcd.print(" Seconds");
53    }
54    timerStop  = true;
55    }
56  }
57
58  if(digitalRead(buttonPin) == HIGH)
59  {
60    StartClock();
61  }
62}
63
64void StartClock()
65{
66    releaseGate.write(openAngle);
67    timerStop = false;
68    startTime = millis();
69    lcd.clear();
70    delay(100);
71    lcd.print("Clock Started");
72    delay(500); 
73    releaseGate.write(closedAngle);
74}
75
76float  DistanceToObstacle()
77{
78   delay(100);
79   long duration, inches, cm;
80   pinMode(distancePingPin, OUTPUT);
81   digitalWrite(distancePingPin, LOW);
82   delayMicroseconds(2);
83   digitalWrite(distancePingPin, HIGH);
84   delayMicroseconds(10);
85   digitalWrite(distancePingPin, LOW);
86   pinMode(distanceEchoPin, INPUT);
87   duration = pulseIn(distanceEchoPin, HIGH);
88   cm = MicrosecondsToCentimeters(duration);
89   return cm;
90}
91
92long MicrosecondsToCentimeters(long microseconds) {
93   return microseconds / 29 / 2;
94}
95

#include <LiquidCrystal.h>
#include <Servo.h>

LiquidCrystal  lcd(12, 11, 5, 4, 3, 2);
Servo releaseGate;

const int distancePingPin  = 9;
const int distanceEchoPin = 10;
const int buttonPin = 6;  
const int  servoPin = 7;  
const int detectionDistance = 10;
unsigned long startTime;
unsigned  long currentTime;
bool timerStop = false;
int closedAngle = 70;
int openAngle  = 170;

void setup() {
  Serial.begin(9600);

  releaseGate.attach(servoPin);

  pinMode(buttonPin, INPUT);
  
  lcd.begin(16, 2);
  startTime = 0;
  StartClock();
}

void loop() 
{
  currentTime = millis();
  
  int distance = DistanceToObstacle();

  if (distance <= detectionDistance)
  {
    if (timerStop == false)
    {
    lcd.clear();
    delay(100);
    float currentT = currentTime;
    float startT = startTime;
    if ((currentT  - startT) /1000 > 60)
    {
          lcd.print(((currentT - startT) /1000)  / 60);
          lcd.print(" Minutes");
    }
    else
    {
          lcd.print((currentT  - startT) /1000);
          lcd.print(" Seconds");
    }
    timerStop  = true;
    }
  }

  if(digitalRead(buttonPin) == HIGH)
  {
    StartClock();
  }
}

void StartClock()
{
    releaseGate.write(openAngle);
    timerStop = false;
    startTime = millis();
    lcd.clear();
    delay(100);
    lcd.print("Clock Started");
    delay(500); 
    releaseGate.write(closedAngle);
}

float  DistanceToObstacle()
{
   delay(100);
   long duration, inches, cm;
   pinMode(distancePingPin, OUTPUT);
   digitalWrite(distancePingPin, LOW);
   delayMicroseconds(2);
   digitalWrite(distancePingPin, HIGH);
   delayMicroseconds(10);
   digitalWrite(distancePingPin, LOW);
   pinMode(distanceEchoPin, INPUT);
   duration = pulseIn(distanceEchoPin, HIGH);
   cm = MicrosecondsToCentimeters(duration);
   return cm;
}

long MicrosecondsToCentimeters(long microseconds) {
   return microseconds / 29 / 2;
}

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