Introduction: LED Distance Sensor
If you are interested in how does the reversing radar work, you can make yourself an ultrasonic reversing radar program. It's an easy one to make. Also, you can make it into different kinds of Distance Sensor.
Step 1: What You Will Need
An Arduino Leonardo
An Ultrasonic
Three LEDs
Eight Circuits
Step 2: Where Should the Wire Stay
Step 3: Find a Box to Put In
Any box you find can do it, but it must fit in the Arduino and the ultrasonic. Whatever it is large or tiny, as long as the Arduino won't break make it as you like.
Step 4: Coding
Here is my code, and you also can look it on here
https://create.arduino.cc/editor/nc29/e901a9ee-663...
int UltrasonicSensorCM(int trigPin, int echoPin) //Ultrasonic Sensor Code Auto Generated Return CM max distance 200{
long duration;
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(20);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
duration = duration / 59;
if ((duration < 2) || (duration > 200)) return false;
return duration;
}
void setup(){ // put your setup code here, to run once:
Serial.begin(9600); // opens serial port, sets data rate to 9600 bps
digitalWrite( 11 , LOW ); //set ultrasonic sensor trigPin
pinMode( 2 , OUTPUT); // sets the digital pin as output
pinMode( 3 , OUTPUT); // sets the digital pin as output
pinMode( 4 , OUTPUT); // sets the digital pin as output
}
void loop(){ // put your main code here, to run repeatedly:
Serial.print( UltrasonicSensorCM( 11 , 12 )); //print message
Serial.print(" "); //print a blank
Serial.println();
if ( UltrasonicSensorCM( 11 , 12 ) > 10 ) {
digitalWrite( 2 , LOW ); // sets the digital pin on/off
digitalWrite( 3 , LOW ); // sets the digital pin on/off
digitalWrite( 4 , LOW ); // sets the digital pin on/off
}
if ( UltrasonicSensorCM( 11 , 12 ) < 10 ) {
digitalWrite( 2 , HIGH ); // sets the digital pin on/off
digitalWrite( 3 , HIGH ); // sets the digital pin on/off
digitalWrite( 4 , HIGH ); // sets the digital pin on/off }
delay( 100 ); // waits a few milliseconds
}
