Robomart Ultrasonic Sensor Module HC-SR-04
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Robomart Ultrasonic Sensor Module HC-SR-04  (Blue)

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Currently Unavailable
Highlights
  • Plastic Material
  • AA Battery
  • Non Rechargeable
Description
This popular ultrasonic distance sensor provides stable and accurate distance measurements from 2cm to 450cm. It has an focus of less than 15 degrees and an accuracy of about 2mm. Usage: Connect the VCC and GND pins to a 5V power supply, the trigger input (Trig) pin to a digital output and the echo (Echo) pin to a digital input on your robot's microcontroller. Pulse the trigger (Trig) pin high for at least 10us (microseconds) and then wait for a high level on the echo (Echo) pin. The amount of time it takes to receive the echo corresponds to the distance that the ultrasonic sound has travelled. The quicker the response, the closer your robot is to an obstacle. This sensor uses ultrasonic sound to measure distance just like bats and dolphins do. Ultrasonic sound has such a high pitch that humans cannot hear it. This particular sensor sends out an ultrasonic sound that has a frequency of about 40kHz. The sensor has two main parts: a transducer that creates an ultrasonic sound and another listens to it's echo. To use this sensor to measure distance, the robot's brain must measure the amount of time it takes for the ultrasonic sound to travel. Sound travels at approximately 340 meters per second. This corresponds to about 29.412us (microseconds) per centimeter. To measure the distance the sound has travelled we use the formula: Distance = (Time x SpeedOfSound) / 2. The "2" is in the formula because the sound has to travel back and fourth. First the sound travels away from the sensor, then it bounces off of a surface and returns back. The easy way to read the distance as centimeters is use the formula: Centimeters = ((Microseconds / 2) / 29). For example, if it takes 100us (microseconds) for the ultrasonic sound to bounce back, then the distance is ((100 / 2) / 29) centimeters or about 1.7 centimeters.
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Specifications
Sales Package
  • 1 Ultrasonic Sensor Module HC-SR-04
Skillset
  • Analysis & Critical Thinking, Creativity & Imagination, General Knowledge
Number Of Batteries
  • 4 Batteries
Minimum Age
  • 12 years
Material
  • Plastic
Battery Operated
  • Yes
Battery Type
  • AA
Rechargeable
  • No
Ratings & Reviews
4.4
122 Ratings &
6 Reviews
  • 5
  • 4
  • 3
  • 2
  • 1
  • 72
  • 36
  • 8
  • 4
  • 2
5

Nice sensor

I used this sensor with Arduino Uno in our obstacle avoider robot. It works flawlessly and provides good precision. It is also very responsive. Totally worth it at such a low price. It is better than IR sensor.
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Ayush Raj

Certified Buyer, Allahabad

Dec, 2015

1
0
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5

Nice one

Guys, i bought this module and its amazing, and its cool to work with Arduino.Totally worth it,...............................
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Rog

Certified Buyer, Chennai

May, 2015

2
0
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5

Simply awesome

the sensor is working fine
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Meenakshu Tyagi

Certified Buyer, Moradabad

May, 2017

1
0
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5

Nice packing and working fine

I bought it and it delivery on time within 3 days and product quality good according to price of HC SRO4
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T

Certified Buyer, Phagwara

Sep, 2016

0
0
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5

Awwsome Product

I Purchased this Sensor for my hobby project. Earlier I was expecting its range about 10-20 cms. But I was Amazed after checking, It was giving accurate reading upto 400 Cms...5 stars.
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deepak singh

Certified Buyer, Gwalior

Sep, 2015

0
0
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5

Very Nice! items

This sensor is very nice. I bought it from Flipkart and was delivered within last date and item is of very good quality.
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Abhishek Adhikari

May, 2015

0
0
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All 6 reviews
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