Object detector using Arduino uno & ultrasonic sensor HC-sr04
It is simple object detector project using arduino ultrasonic module Parts list-- Bread board LED ( RED & GREEN) Resistor -220 ohms Male to male jumper wire arduino uno arduino ultrasonic module ( HC-SR04) HC-SR04 connection VCC--5V GND--GND TRIG-- D2 ECHO-D3 LED RED -- D8 GND via resistor LED GREEN-- D9 GND via resistor PIEZO BUZZER --D11 GND--GND Supply 9V Battery ARDUINO CODE :- //Ultasonic Sensor //Pins connected to the ultrasonic sensor #define trigPin 2 #define echoPin 3 //LED pins #define ledGreen 9 #define ledRed 8 //Pin connected to the piezo buzzer #define alarm 11 int range = 5;//range in inches void setup() { // initialize serial communication: Serial.begin(9600); //initialize the sensor pins pinMode(trigPin, OUTPUT); pinMode(echoPin, INPUT); //initialize LED pins pinMode(ledGreen, OUTPUT); pinMode(ledRed, OUTPUT); //set LEDs digitalWrite(ledGreen, HIGH); digitalWrite(led