Purpose of this project:
In this project an obstacle detection system will be built with Arduino. This system mainly uses an ultrasound sensor, buzzer and LED.
When the ultrasonic sensor detects an obstacle at a distance < 3cm, the Arduino orders the buzzer to ring and the red LED to light up.
Necessary components
- Arduino UNO
- ultrasonic sensor (HC-SR04)
- buzzer
- 1 resistance 220Ω
- 1 red LED
- connecting wires
Mounting
To make the assembly, we can connect :
For LED and buzzer:
- the terminals (+) of the red LED and buzzer to the digital pin 1 of Arduino.
- the (-) terminals of the red LED and buzzer at the GND pin of Arduino.
For HC-SR04 sensor:
- TRIG pin to pin 2 of Arduino
- Echo pin tp pin 3 of Arduino.
- VCC pin to 3.3V of Arduino
- GND pin to GND of Arduino
or the LCD display:
-
the SDA pin at the Arduino analog pin A4.
-
the SCL pin at the Arduino analog pin A5.
-
the VCC pin at the Arduino 5v pin.
-
the GND pin at the Arduino GND pin
Program
The Obstacle Detection System program is as follows:
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 |
#include <HCSR04.h> #include <LiquidCrystal_I2C.h> LiquidCrystal_I2C lcd(0x27, 20, 4); const int LEDBuzzerPin=1; const int trigPin = 2; const int echoPin = 3; UltraSonicDistanceSensor distanceSensor(trigPin, echoPin); void setup(){ lcd.init(); pinMode(LEDBuzzerPin,OUTPUT); } void loop(){ lcd.backlight(); lcd.clear(); lcd.print("distance = "); lcd.setCursor(0,1); lcd.print(distanceSensor.measureDistanceCm()+1); lcd.print(" cm"); if((distanceSensor.measureDistanceCm()+1)<3) { digitalWrite(LEDBuzzerPin,HIGH); // red LED lights up and buzzer starts ringing }else { digitalWrite(LEDBuzzerPin,LOW); // red LED goes out and buzzer stops } delay(500); } |
You can also see
0 commentaire
Leave a comment
Recent tutorials
Most viewed tutorials
Most commented tutorials
Scroll to Top