IR-LDR-ULTRASONIC-CODE Infrared Sensor: If an object is detected by the infrared sensor then LED glows up. Basically when IR sensor state will be low then only the LED will glow up. I have attached ...

Components Needed Arduino board HC-SR04 Ultrasonic Sensor 8 LEDs 8 Resistors (220Ω each) Buzzer Breadboard and jumper wires Circuit Diagram Ultrasonic Sensor: VCC to 5V GND to GND TRIG to digital pin ...