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
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