The datasheet of hcsr04 can be obtained here, hcsr04. This economical sensor provides 2cm to 400cm of noncontact measurement functionality with a ranging accuracy that can reach up to 3mm. Heres an example of the us100 in hc sr04 compatibility mode wired up to a raspberry pi. The hcsr04 ultrasonic sensor uses sonar to determine distance to an object like bats or dolphins do. The famous hc sr04 ultrasonic sensor generates ultrasonic waves at 40khz frequency. Oct 06, 2018 the hc sr04 ultrasonic sensor module can measure distances form 2 cm to 400 cm 4 m with an accuracy of 3 mm. Apr 12, 2020 the hc sr04 ultrasonic distance measurement control module automates the use of the hc sr04 ultrasonic module and provides a direct readout of the distance. Datasheet search engine for electronic components and semiconductors. Ultrasonic sensor hcsr04 provides an output signal proportional to distance based on the echo. The hcsr04 ultrasonic sensor module can measure distances form 2 cm to 400 cm 4 m with an accuracy of 3 mm. If you have an electronic device that needs to sense distances from objects like a robot or an automatic door opener you might consider using an hcsr04 sensor module. The working rule for hcsr04 module ultrasonic sensor distance measuring module when the module get trigger begin beat, it sends eight 40khz square wave heartbeats and naturally recognize whether get the returning heartbeat signal. Complete guide for ultrasonic sensor hcsr04 with arduino.
Hcsr04 ultrasonic distance sensor with arduino dronebot. Ultrasonic ranging module hc sr04 product features. Is there any possible way for increasing the range of hc sr04 circuit or is there any sensor which measuring range is greater than 400cm. Ultrasonic sensors are relatively simple devices and extremely useful in a lot of high tech setups. Hc sr04 ultrasonic sensor working as shown above the hc sr04 ultrasonic us sensor is a 4 pin module, whose pin names are vcc, trigger, echo and ground respectively. Then equation 3 can be used to easily compute the distance in centimeters. If youre like me, youve dreamed of being a dolphin. Connect the components based on the figure shown in the wiring diagram using a mm pin connector. Hc sr04 datasheet, hc sr04 pdf, hc sr04 pinout, equivalent, replacement ultrasonic user guide elecfreaks, schematic, circuit, manual. The hc sr04 is an ultrasonic proximity sensor that tells you whether an object is in front of it, and also provides the distance between the sensor and the object. Hcsr04 is an ultrasonic ranging module that provides 2 cm to 400 cm noncontact measurement function. The hc sr04 requires a voltage divider to allow the sensor 5v logic to work with 3v logic. To use equation 1 the speed of sound needs to determined,which is 343 meters per second at standard temperature and pressure. The modules includes ultrasonic transmitters, receiver and control circuit.
The length of the returning pulse is proportional to the distance of the object from the sensor. Until genetic modifications catches up with our desires, well just have to make do with these handy hc sr04. Module size and software is fully compatible with the old hcsr04 version. The hcsr04 requires a voltage divider to allow the sensor 5v logic to work with 3v logic. Use an hcsr04 ultrasonic sensor to give your robot the perception of distance. Hc sr04 with arduino, dht11 and i2c lcd wiring diagram. The ranging accuracy can reach to 3mm and effectual angle is 50 million semiconductor datasheets. Sainsmart hcsr04 ranging detector mod distance sensor blue 4. Vcc pin is connected to the 5v power supply, gnd pin is connected to the gnd and the trig and echo pins are connected to the digital io pins. The ultrasonic receiver would detect the reflected wave and stop the stop timer. Hcsr04 datasheet, hcsr04 pdf, hcsr04 pinout, equivalent, replacement ultrasonic user guide elecfreaks, schematic, circuit, manual. The hcsr04 is an ultrasonic proximity sensor that tells you whether an object is in front of it, and also provides the distance between the sensor and the object. Hc sro4 ultrasonic sensor module 1 pin mm connectors breadboard usb cable 1.
Heres an example of the us100 in hcsr04 compatibility mode wired up to a raspberry pi. Mar 30, 2017 connect hc sr04 as a 3 pin ultrasonic sensor. Heres a list of some of the hcsr04 ultrasonic sensor features and specs. Hc sr04 ultrasonic distance sensor with dht11, i2c lcd and arduino example code. May 10, 2019 the hc sr04 is an ultrasonic proximity sensor that tells you whether an object is in front of it, and also provides the distance between the sensor and the object. Hcsr04hcsr04p ultrasonic module distance measuring. Codebender includes a arduino web editor so you can code, store and manage your arduino sketches on the cloud, and even compile and flash them. To convert this into more useful form use equation 2 to change from meters per second to microseconds per. To begin measuring the distance, the microcontroller sends a trigger signal to the ultrasonic sensor. Advantages and disadvantages of ultrasonic distance sensor.
The detection range as written in the data sheet is between 2 cm to 4 m, but experiments show that 3 cm to 2 m is more realistic. If there is a returning pulse signal, it is measured, and the length of time the pulse remains at. It will also discuss some sources of errors and bad readings. It is commonly used in obstacle avoiding robots and automation projects. The hcsr04 ultrasonic distance sensor is a popular affordable sensor that provides 2cm 0. Hcsr04 ultrasonic distance sensor with arduino 5 examples. It can be perfectly interrupted with the old hc sr04 version. Dual ultrasonic module with code examples and wiring diagram. Jul 06, 20 the datasheet of hc sr04 can be obtained here, hc sr04. The contents of the example are see exemples folder. The principle of ultrasonic distance measurement used the alreadyknown air spreading velocity, measuring the time from launch to reflection when it. Im not getting the stable values around the range of 400cm with hc05 sensor. Hai sir, as we know ultrasonic sensor range is aout 2cm to 400cm.
If an object doesnt present a flat surface to the sensor then it is possible the sound wave will bounce off the object in a way that it does not return to the sensor. Hcsr04 datasheet ultrasonic proximity sensor custom maker. Oct 05, 2018 the hc sr04 ultrasonic us sensor is an ultrasonic transducer that comes with 4 pin interface named as vcc, trigger, echo, and ground. Apr 27, 2014 the hcsr04 module includes transmitters, a receiver and control circuit. To interpret the time reading into a distance you need to change equation 1. The ranging accuracy can reach to 3mm and effectual angle is hc sr04 user guide the transmitter emits a 8 bursts of an directional 40khz ultrasonic wave when triggered and starts a timer. Interfacing pic mcu with hcsr04 ultrasonic sensor mplab.
Ultrasonic sonar distance sensors adafruit industries. Sainsmart hcsr04 ranging detector mod distance sensor blue. The ranging accuracy can reach to 3mm and effectual angle is data sheet, hcsr04 manual, hcsr04 pdf, hc. Hcsr04 datasheet, hcsr04 pdf, hcsr04 data sheet, hcsr04 manual, hcsr04 pdf, hcsr04, datenblatt, electronics hcsr04, alldatasheet, free, datasheet, datasheets. The working principle, applications and limitations of. This popular ultrasonic distance sensor provides stable and accurate distance measurements from 2cm to 450cm. Using your echolocation abilities to detect tasty fish treats.
An hc sr04 module can operate through a single line as like a ping sensor. The purpose of this file is to explain how the hcsr04 works. The hcsr04 ultrasonic distance measurement control module automates the use of the hcsr04 ultrasonic module and provides a direct readout of the distance. Animals such as bats and porpoises use ultrasound for locating prey and obstacles. Ultrasonic sensors use sound to determine the distance between the sensor and the. Hcsr04hcsr04p ultrasonic module distance measuring sensor. Ping sensor this sketch reads a ping ultrasonic rangefinder and returns the distance to the closest object in range. Arduino ultrasonic sensor hc sr04 or hysrf05 both these ultrasonic range modules are fairly cheap modules, expect the hysrf05 to be the more expensive of the these two. But i want to measure the distance which is greater than 400cm. As shown above the hcsr04 ultrasonic us sensor is a 4 pin module, whose pin names are vcc, trigger, echo and ground respectively. This post shows how to make a simple distance meter using pic16f887 microcontroller and hcsr04 ultrasonic sensor. Ultrasonic ranging module hc sr04 provides 2cm 400cm noncontact measurement function, the ranging accuracy can reach to 3mm.
The datasheet of the sensor can be found at the following link. This tiny sensor is capable of measuring the distance between itself and the nearest solid object, which is really good information to have if youre trying to avoid driving into a wall. Ultrasonic pulses travel outward until they encounter an object, the object causes the the wave to be reflected back towards the unit. The hcsr04 ultrasonic sensor uses sonar to determine distance to an object like bats do. It displays both the temperature, the speed of sound and the measured distance on the lcd.
Ultrasonic distance measurement with hcsr04 arobito 0. The hc sr04 ultrasonic us sensor is an ultrasonic transducer that comes with 4 pin interface named as vcc, trigger, echo, and ground. Each hcsr04 module includes an ultrasonic transmitter, a receiver and a control circuit. Typically, a microcontroller is used for communication with an ultrasonic sensor. More than 12,600,000 visits per month all around the world.
Use an hc sr04 ultrasonic sensor to give your robot the perception of distance. Module size and software is fully compatible with the old hc sr04 version. It comes complete with ultrasonic transmitter and receiver modules. The hcsr04 ultrasonic distance sensor is an inexpensive device that is very useful for robotics and test equipment projects. The hcsr04 ultrasonic us sensor is an ultrasonic transducer that comes with 4 pin interface named as vcc, trigger, echo, and ground. Hcsr04 ultrasonic sensor working as shown above the hcsr04 ultrasonic us sensor is a 4 pin module, whose pin names are vcc, trigger, echo and ground respectively. Apr 12, 2019 the hc sr04 ultrasonic distance sensor is a popular affordable sensor that provides 2cm 0. It has a focus of less than 15 degrees and an accuracy of about 2mm. It can be perfectly interrupted with the old hcsr04 version.
It is very useful for accurate distance measurement of the target object and mainly works on the sound waves. So it can run with the same arduino code used for a ping sensor. The code below can be used to combine all 3 examples above. Hcsr04 is an ultrasonic ranging module that provides 2 cm to 400 cm. Ultrasonic distance sensor 3v or 5v hcsr04 compatible.
Library for ultrasonic distance sensor hc sr04 48 commits 2. The sensor here generates a sound vibration in ultrasonic range upon giving a trigger, after that it waits for the sound vibration to return. The senor receives this signal and converts it to an electric signal. Ultrasonic sensor hcsr04 calculation of distance between. The parallax ping ultrasonic distance sensor provides precise, noncontact distance measurements from about 2 cm 0. To do this, it sends a pulse to the sensor to initiate a reading, then listens for a pulse to return. This sensor is a very popular sensor used in many applications where measuring distance or sensing objects are required. The duty cycle of this trigger signal is 10s for the hcsr04 ultrasonic sensor. Hcsr04 specifications the sensor chosen for the firefighting drone project was the hcsr04.
Ultrasonic distance measurement using arduino how to make. Hc sr04 user guide part 1 ultrasonic introduction 1. As we connect the module to 5v and initialize the input pin, it starts transmitting the sound waves. The working principle of a ultrasonic sensor is as below. I have sketch the working principle of ultrasonic sensor to give a better. The clock on the device you are using will probably count in microseconds or smaller.
A 4 pin hc sr04 need to be interfaced like a 3 pin sensor module for a 3 wire connection, which shares the trigger and echo pins to operate in a single line. Sainsmart hc sr04 ranging detector mod distance sensor blue 4. It is very easy to connect to microcontrollers such. As we connect the module to 5v and initialize the input pin, it starts transmitting the sound waves which then travel through the air and hit the. In this tutorial, you will learn how the sensor works and how to use it with arduino.
This post shows how to make a simple distance meter using pic16f887 microcontroller and hc sr04 ultrasonic sensor. If youre like me, youve dreamed of being a dolphin smoothly gliding through the water. Each hc sr04 module includes an ultrasonic transmitter, a receiver and a control circuit. Hcsr04 ultrasonic sensor example by sparkfun arduino ide. Introduction to hcsr04 ultrasonic sensor the engineering. Hcsr04 ultrasonic distance measurement control module.
Nov 24, 2018 this is the hc sr04 ultrasonic ranging sensor. The hcsr04 module includes transmitters, a receiver and control circuit. The hc sr04 module includes ultrasonic transmitter, ultrasonic receiver and control circuit. To start measurement, trig of sr04 must receive a pulse of high 5v for at least 10us, this will initiate the sensor will transmit out 8 cycle of ultrasonic burst at 40khz and wait for the reflected ultrasonic burst. Is there any possible way for increasing the range of hcsr04 circuit or is there any sensor which measuring range is greater than 400cm.
Hcsr04 user guide the transmitter emits a 8 bursts of an directional 40khz ultrasonic wave when triggered and starts a timer. This sensor uses ultrasonic sound to measure distance just like bats and dolphins do. This distance sensor works by sending out an ultrasonic wave from the trigger terminal and detecting whether there is a pulse signal back through the echo. Now based on the parameters, sound speed 220ms and time taken for the echo to reach the source, it. On the off chance that there is signs returning, through yielding abnormal state and the season of abnormal state proceeding is the season of that from the. Timing chart, pin explanations and taking distance measurements 4. At a quick glance there are only small differences between these two.
Hcsr04 datasheet ultrasonic proximity sensor custom. Hcsr04 user guide part 1 ultrasonic introduction 1. Arduino distance sensor using the hcsr04 pi my life up. Hcsro4 ultrasonic sensor module 1 pin mm connectors breadboard usb cable 1. The hcsr04 module includes ultrasonic transmitter, ultrasonic receiver and control circuit. It offers excellent noncontact range detection with high accuracy and stable readings in an easytouse package. Us transmitter receiver pair, ir sensor module, ir sensor pair, ir analog distance sensor, hcsr04 ultrasonic sensor working.