使用超音波距離感測器和 Arduino + LED 進行距離測量

使用超音波距離感測器和 Arduino + LED 進行距離測量展示如何使用超聲波傳感器（HC-SR04）構建運動檢測LED

1 個 Arduino uno r3 開發板
1 個LED（顏色不拘）
1個220歐姆電阻
1個麵包板
1個Arduino USB電纜
帶夾子的1 x 9V電池（可選）
6 x 跳線

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第2步：定位零件

首先插入超聲波傳感器和麵包板上的LED。將LED的較短引線（陰極）連接到傳感器的GND引腳。然後，將電阻與LED較長的引線（陽極）放在同一行，以便連接。

第3步：連接部件

現在，您需要在傳感器背面插入一些電線。有四個引腳 - VCC，TRIG，ECHO和GND。插入電線後，您需要進行以下連接：

電阻的末端連接到您選擇的數字引腳，只需確保稍後在代碼中進行更改即可！

傳感器| Arduino的

VCC - > 5V

TRIG - > 5 *

ECHO - > 4 *

GND - > GND

* - 可以連接到Arduino的任意兩個數字引腳，只要確保在代碼中更改它們即可！

第4步：上傳代碼

const int ledPin = 6; // The pin of your LED
const int trigPin = 5; // The pin to which the TRIG is connected
const int echoPin = 4; // The pin to which the ECHO is connected
const int ledOnTime = 1000; // The time that the LED stays on, after detecting the motion (in milliseconds, 1000ms = 1s)
const int trigDistance = 20; // The distance (and lower than it) at which the sensor is triggered (in centimeters)
int duration;
int distance;
void setup() {
pinMode(ledPin, OUTPUT);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
}
void loop() {
digitalWrite(trigPin, LOW);
digitalWrite(trigPin, HIGH);
delay(1);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = duration * 0.034 / 2;
if (distance <= trigDistance) {
digitalWrite(ledPin, HIGH);
delay(ledOnTime);
digitalWrite(ledPin, LOW);
}
delay(100);
}

const int ledPin = 6; // The pin of your LED

const int trigPin = 5; // The pin to which the TRIG is connected

const int echoPin = 4; // The pin to which the ECHO is connected

const int ledOnTime = 1000; // The time that the LED stays on, after detecting the motion (in milliseconds, 1000ms = 1s)

const int trigDistance = 20; // The distance (and lower than it) at which the sensor is triggered (in centimeters)

int duration;

int distance;

void setup() {

pinMode(ledPin, OUTPUT);

pinMode(trigPin, OUTPUT);

pinMode(echoPin, INPUT);

}

void loop() {

digitalWrite(trigPin, LOW);

digitalWrite(trigPin, HIGH);

delay(1);

digitalWrite(trigPin, LOW);

duration = pulseIn(echoPin, HIGH);

distance = duration * 0.034 / 2;

if (distance <= trigDistance) {

digitalWrite(ledPin, HIGH);

delay(ledOnTime);

digitalWrite(ledPin, LOW);

}

delay(100);

}

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使用超音波距離感測器和 Arduino + LED 進行距離測量