In this post, we will be discussing making an Ultrasonic Range Finder by using the HC-SR04 sensor very easily at home. You can use any beginner kit of Arduino to make it, as the parts required are easily available with it.

Supplies

Arduino Uno R3
Breadboard
Jumper Wires
HC-SR04 sensor
Buzzer LED
Resistor 220ohm

Step 1: Procedure

The HC-SR04 Ultrasonic Module has 4 pins, Ground, VCC, Trig, and Echo.
The Ground and the VCC pins of the module need to be connected to the Ground and the 5 volts pins on the Arduino Board respectively and the trig and echo pins to any Digital I/O pin on the Arduino Board.
The HC-SR04 sensor attaches to the Breadboard
The Sensor VCC connect to the Arduino Board +5V
The Sensor GND connect to the Arduino Board GND
The Sensor Trig connect to the Arduino Board Digital I/O 9
The Sensor Echo connects to the Arduino Board Digital I/O 10 Buzzer and LED The Buzzer to attach to the Breadboard
The Buzzer long leg (+) connects to the Arduino Board Digital 11
The Buzzer short leg (-) connects to the Arduino Board GND
The LED attached to the Breadboard
The Resistor connect to the LED long leg (+)
The Resistor another leg (from LED's long leg) connect to the Arduino Board Digital 13
The LED short leg (-) connect to the Arduino Board GND