Ultrasonic Sensor with Arduino

In this tutorial, we learn how to measure the distance by using the Ultrasonic Sensor with Arduino. We also use an LCD 16×2 Display to show the distance.

An ultrasonic sensor is used to measure the distance to an object using sound waves. It provides measurements of the time that takes the sound to fling something and return it to the sensor. Read More

It works on sound wave frequency like sonar. The ultrasonic sensor also cannot detect some objects.

HC-SR04 ultrasonic can measure a range of 2 cm to 400 cm (4 m).

This sensor has 2 openings on its front. One is the transmitter which transmits ultrasonic waves like a speaker and the other is a receiver that receives them like a microphone.

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Components List

• Ultrasonic Sensor (HC-SR04)
• Arduino Uno
• Jumper Wires
• LCD Display 16×2

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Pin Connections

Ultrasonic Pins	Arduino Pins
5v or Vin	5V
GND	GND
Trigger	9
Echo	8

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Circuit Diagram for Ultrasonic Sensor With Arduino

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Code For Ultrasonic Sensor Arduino

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Output

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Ultrasonic Sensor and LCD 16×2 with Arduino

Now we are displaying the distance reading (sensor values) of the ultrasonic sensor on an LCD Display 16×2.

Read More about LCD 16×2:

Pin Connections of LCD 16×2 with Arduino

Pin No.	LCD Pins	Arduino Pins
1	VSS/GND	GND
2	VDD/VCC	5v
3	V0	Potentiometer Vout
4	RS	12
5	RW	GND
6	E	11
7-10	D0-D3	No connection
11	D4	5
12	D5	4
13	D6	3
14	D7	2
15	A/LED+	5v
16	K/LED-	GND

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Circuit Diagram of Ultrasonic Sensor and LCD

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Code

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Output

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