ultrasonic

wirng diagram

code Uno

byte ledPin[] = {4, 5, 6, 7, 8, 9, 10, 11, 12, 13}; // Create
array for LED pins
int ledDelay; // delay
between changes
int direction = 1;
int currentLED = 0;
unsigned long changeTime;
int potPin = 2; // select
the input pin for the potentiometer
void setup() {
for (int x=0; x<10; x++) { // set all
pins to output
pinMode(ledPin[x], OUTPUT);
}
changeTime = millis();
}
void loop() {
ledDelay = analogRead(potPin); // read the
value from the pot
if ((millis() - changeTime) > ledDelay) { // if it has
been ledDelay ms since last change
changeLED();
changeTime = millis();
}
}
void changeLED() {
for (int x=0; x<10; x++) { // turn off
all LED's
digitalWrite(ledPin[x], LOW);
}
digitalWrite(ledPin[currentLED], HIGH); // turn on the
current LED
currentLED += direction; // increment
by the direction value
// change direction
if we reach the end
if (currentLED == 9) {direction = -1;}
if (currentLED == 0) {direction = 1;}
}

ultrasonic with lcd

code Uno

#include <LiquidCrystal.h>
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);
const int trigPin = 11;
const int echoPin = 10;
const int led = 13;


void setup() 
{
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(led, OUTPUT);
  lcd.begin(16, 2);
  lcd.print ("Ultrasonic ");
  lcd.setCursor(0, 1);
  lcd.print ("Range Meter");
  delay (5000);
    
}
long duration, r;
float distance;

void loop()
{
  lcd.clear();
  lcd.print("Distance in cm");
    
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  duration = pulseIn(echoPin, HIGH);
  long r = 3.4 * duration / 2;     
  float distance = r / 100.00;
  
  lcd.setCursor(0, 1);
  lcd.print(distance);
  delay (300);

  
 
 if(distance<10)
  {
    digitalWrite(led,HIGH);
  }
 else
  {
    digitalWrite(led,LOW);
  }
  
 delay(300);
}

https://youtu.be/9gI_lCXdA78