1) 利用 Arduino 的数字引脚给超声波传感器的 Trig 引脚至少 10 微秒的高电平信号,这会让HC-SR04 超声波测距模块发射出8个40K赫兹的超声波脉冲(ultrasonic burst)。 2) 8个超声波脉冲发出后,echo引脚会输出高电平。假如没有声波返回,echo引脚会在38微秒后输出低电平。假如有声波返回,echo引脚会进入低电平状态。
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/Firmware - Arduino example code. Make sure to check the pin definitions and what you are connecting to. Documentation Hookup Guide - Basic hookup and project example using the ultrasonic sensor. (Note: The example code used in this tutorial is slightly different than the basic example used ...
With Arduino ultrasonic sensors like the HC-SR04, you can measure the distance. Through this Arduino tutorial, you will learn how an Ultrasonic sensor works and how do you use it with the Arduino and even with the Raspberry Pi. What is an Arduino Ultrasonic Sensor? An ultrasonic sensor is ...
Arduino - 超声波传感器( Ultrasonic Sensor) HC-SR04超声波传感器使用SONAR来确定物体的距离,就像蝙蝠一样。 它提供出色的非接触式范围检测,具有高精度和稳定的读数,易于使用的包装,从2厘米到400厘米或1英寸到13英尺。 操作不受阳光或黑色材料的影响,虽然声学上很难检测到布料之类的柔软材料。 它配有超声波发射器...
We will first look at an example that does not use an Arduino library. Next, I will show you how you can use the NewPing library to create a more compact code.Cheap ultrasonic distance/proximity sensors are great but in some projects, you might need a waterproof sensor like the JSN-SR04...
/* Arduino example code for MaxBotix MB1240 XL-MaxSonar-EZ4 ultrasonic distance sensor: analog voltage output. More info: www.makerguides.com */ #define sensorPin A0 int distance = 0; void setup() { Serial.begin(9600); } void read_sensor() { distance = analogRead(sensorPin) * 1; } ...
}Code language:Arduino(arduino) Example Code Using the NewPing Library There are actually a simpler and better way to program the Arduino to measure distance using the HC-SR04 ultrasonic sensor, and that’s using theNewPinglibrary. In the previously explained code we manually triggered the sensor...
The Ultrasonic sensor has four terminals - +5V, Trigger, Echo, and GND connected as follows − Connect the +5V pin to +5v on your Arduino board. Connect Trigger to digital pin 7 on your Arduino board. Connect Echo to digital pin 6 on your Arduino board. ...
The Arduino Six jumper wires An ultrasonic sensor, like the HC-SR04 Here's what we are going to build (as shown in the schematic below): The sensor will constantly take distance measurements of whatever happens to be in front of it: your hand, books etc. The Arduino will receive these ...