ORG030

DEEP SEA BIG PINEAPPLE GROUP

Arduino Basic Experiment

water light program

Demo Introduction

Five LED lights light up one by one, achieving a forward and backward flowing light effect.

List of components

  • Arduino UNO * 1

  • Breadboard * 1

  • LED * 5

  • 1kΩ resistance * 5

  • Some Dupont threads

Schematic circuit diagram

Arduino code

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
int ledMark = 2;  // The first LED corresponds to digital pin 2 on the board
int num = 5;   // Number of LEDs

void setup() {
   for (int i = ledMark; i < ledMark + num; i++) {
     pinMode(i, OUTPUT);   // Set digital pins 2 to 6 as output mode
   }
}

void loop() {
   for (int i = ledMark; i < ledMark + num; i++) {
     digitalWrite(i, HIGH);    // Set the corresponding digital pin to HIGH, turning on the LED gradually from the positive direction
     delay(200);        // Delay 200ms
     digitalWrite(i, LOW);
     delay(100);
   }  
   
   for (int i = ledMark + num - 2; i > ledMark; i--) { // Note that the last LED does not need to be turned on again
     digitalWrite(i, HIGH);    // Set the corresponding digital pin to HIGH, turning on the LED gradually from the reverse direction
     delay(200);        // Delay 200ms
     digitalWrite(i, LOW);
     delay(100); 
   }  
}

Run result

Reference

Arduino实现流水灯、抢答器

Arduino Input & Output Practice

Demo Introduction

The 1602 LCD screen displays the team name and distance measurement results (in centimeters). The servo motor will rotate at an angle based on the distance measurement results; the larger the distance, the greater the rotation angle. When unable to measure the distance (set to be greater than 50cm), the screen will display ‘Too far,’ and the servo motor will return to its original position.

List of components

  • LCD display monitor
  • potentiometer
  • Ultrasonic distance sensor
  • Servo motorSG90

Schematic circuit diagram

Arduino code

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
#include <LiquidCrystal.h>
#include <Servo.h>
#define PIN_SERVO 10
Servo myservo;
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

#define TrigPin A0
#define EchoPin A1  // Pin setting of ultrasonic sensor
int count = 0;
long duration; // PULSE WIDTH

void setup() {
  lcd.begin(16, 2); // Set up the LCD's number of columns and rows
  Serial.begin(115200); // Set Serial communication
  
  pinMode(TrigPin, OUTPUT); // Set pin mode
  pinMode(EchoPin, INPUT);
  
  digitalWrite(TrigPin, LOW); // Initialize pin
  delay(1);
  
  myservo.attach(PIN_SERVO);
  myservo.write(0);  // Initialize the servo position
}

void loop() {
  lcd.clear(); // Clear screen information
  lcd.print("Team Pineapple");   // Output team name on the first line
  lcd.setCursor(0, 1); // Set the cursor to column 0, line 1
  lcd.print("Distance:"); // Output distance information on the second line

  delay(300);
  
  long IntervalTime = 0; // Define a time variable
  digitalWrite(TrigPin, HIGH); // Set high level
  delayMicroseconds(15); // Delay 15us
  digitalWrite(TrigPin, LOW); // Set low level
  IntervalTime = pulseIn(EchoPin, HIGH); // Sample the width of the feedback high level using the built-in function, in microseconds
  float S = IntervalTime / 58.00; // Calculate distance in centimeters using floating-point arithmetic
  if (S > 50) {
    lcd.print("Too far"); // If the distance is greater than 50cm, print "Too far"
    myservo.write(0); // If the distance is greater than 50cm, reset the servo angle
  } else {
    lcd.print(S); // If the distance is within 50cm, print the distance in centimeters
    myservo.write(S * 10); // If the distance is within 50cm, rotate the servo angle ten times the distance
  }
  S = 0;
  IntervalTime = 0; // Reset corresponding values
  delay(500); // Delay interval determines the sampling frequency
}

Run result

Reference

https://www.nexmaker.com/doc/5arduino/Arduino_output.html

Arduino基础教程——3.5超声波测距模块