14 best ultrasonic sensor

• Test mode :Using IO trigger for high level signal.( Not less that 10us),The Module sends eight 40 kHz automatically and detect whether there is a pulse signal back.
• The detection zone: 0.78~196 in/ (2cm~500cm); High precision: up to 0.12 in/(0.3 cm) Effectual angle: less than 15°
• Power supply: 5V DC; Quiescent current: less than 2mA.
• Test distance = ((Duration of high level)*(Sonic :340m/s))/2
• Package included: 5pcs HC-SR04+ 2pcs Mounting Bracket(support HC-SR04 only)

User questions & answers

Question:	what is effective usable minium and maximum range
Answer:	I have used it between 1” - 5’ but aiming is critical.
Question:	What is the maximum length of the wiring back to the Pi
Answer:	I have used 24 inch with out problems.
Question:	What is the working power of this device
Answer:	As each of this device shows 5dvc working voltage. The echo output also sends a 5vdc signal. So if you use a raspberry pi (inputs rated for 3.3vdc) you need to knock the voltage down first.
Question:	What size of screw is used on the mounting brackets? (The size/type of screw that came with the product
Answer:	Hello. It used PM3*6 Phillips screw and M3 nut.

Product features

For Arduino Project with Ultrasonic Sensor

Smraza Ultrasonic Module HC-SR04 Distance Sensor is cheap and easy to start. You can download the relevant tutorial to reference from our web smraza.com.

Smraza HC-SR04 consists of ultrasonic transmitter, receiver, and control circuit. Connection mode: VCC, trig (control), echo (receiving end), GND ground wire.

Ultrasonic Sensor Module Working Principle

Pull the Trig pin to high level for more than 10us impulse, the module start ranging.

The module automatically sends eight 40KHz square wave to detect whether a signal is returned.

Finished ranging, If you find an object in front, Echo pin will be high level, and based on the different distance, it will take the different duration of high level.

So we can calculated the distance easily. The distance = ((Duration of high level)*(Sonic :340m/s))/2. Distance L = 1/2 × T × C

Technical Parameters

1. Use voltage: DC 5V

2. Quiescent current: less than 2mA

3. Level output: high 5V low 0V

4. Induction angle: no more than 15 degrees(<15°)

5. Detection range: 0.78~196 in/ (2cm~500cm)

6. High accuracy: up to 0.12 in/(0.3 cm)

7. Trigger Input Pulse width: 10uS

8. Dimensions: 1.3 x 0.4 x 0.1 inch/3.03 x 1 x 0.25 cm (L*W*H)

Product description

HC-SR04 Ultrasonic Sensor 

Power Supply :5V DC 

Quiescent Current : <2mA 

Effectual Angle: <15° 

Ranging Distance : 2cm - 500 cm 

Resolution : 0.3 cm 

Mode of Connection: VCC/ trig(T)/ Echo(R)/ GND

(VCC supply 5V, and GND is ground wire. TRIG is trigger control signal input, ECHO is echo signal output.) 

Quantity: 10pcs

Attention:

The module should be inserted in the circuit before been powered to avoid producing high level of misoperation; if producted, power it again.

The module is not suggested to connect directly to electric, if connected electric, the GND terminal should be connected the module first, otherwise,it will affect the normal work of the module.

When tested objects, the range of area is not less than 0.5 square meters and the plane requests as smooth as possible, otherwise ,it will affect the results of measuring.

• Ultrasonic Module HC-SR04 Distance Measuring Ranging Sensor for Arduino
• This module has stable performance and accurate measurement distance.
• Detection distance: 0.78~196 in/ (2cm~500cm); High precision: up to 0.12 in/(0.3 cm); Detection angle: <15 °.
• HC-SR04 Arduino ultrasonic sensor can send eight 40 kHz and detect whether there is any pulse signal back.If it back, a high level signal will be outputed by IO, and the duration of the signal is the time from sending ultrasonic to returning.
• This module is fully Compatible with GH-311 anti-theft module.

• Ultrasonic hc-sr04 distance measuring transducer sensor
• HC-SR04 consists of ultrasonic transmitter, receiver, and control circuit. When trigged it sends out a series of 40KHz ultrasonic pulses and receives echo from an object.
• ~Power supply: 5V DC; quiescent current: less than 2mA; effectual angle: less than 15°; distance: 2cm500cm; resolution: 0. 3 cm~
• Package Content: 5pcs HC-SR04 with a little gift

User questions & answers

Question:	What are the measurements of one of these
Answer:	Google “SR04 dimensions”
Question:	Will this work for a BeagleBone
Answer:	Can't say for sure, have only used these with Uno and Mega, work fine - note they have 4 pins (separate send/receive) as opposed to others with 3 pins (shared send/receive function). Great price - I've seen these sold for as much as $20 each.
Question:	Can you keep them on 24/7 without running to reliability issues? Any thoughts
Answer:	No, this module has no waterproof and temperature compensation function, you need to look for the prefessional one if you want to use it on 24/7.
Question:	Do these things have to be plugged in
Answer:	I see from comments by others that I'm not the only one puzzled by your question. This device is a distance measuring sensor. As such, sensors need to be connected, or plugged into, other circuitry to make them work. In the case of the HC-SR04, it needs a signal, a pulse, from a circuit, Arduino microcontroller for example, to initial distance measurement and a circuit to receive the pulse signal from the HC-SR04 and do a time/distance calculation. Again an Arduino microcontoller. Is this all new to you? If so, there is a lot you will have to learn before you can use this device. There is plenty of help online however.

Product features

Operatiing Principle of Ultrasonic Sensor

As the name indicates, ultrasonic sensors measure distance by using ultrasonic waves. The sensor head emits an ultrasonic wave and receives the wave reflected back from the target. Ultrasonic Sensors measure the distance to the target by measuring the time between the emission and reception. The distance can be calculated with the following formula: Distance L = 1/2 × T × C where L is the distance, T is the time between the emission and reception, and C is the sonic speed. (The value is multiplied by 1/2 because T is the time for go-and-return distance.)

For Arduino Project with Ultrasonic Sensor

Elegoo Ultrasonic Sensor HC-SR04 is inexpensive and easy to use since we will be using a Library specifically designed for this sensor, which can be downloaded from elegoo.com. To use it for Arduino projects you would need an ELEGOO UNO R3 controller board.

Technical Specification

• Power Supply :+5V DC
• Quiescent Current : 3mA
• Working Current: < 5mA
• Effectual Angle: <15°
• Ranging Distance : 2cm - 300 cm/1″ - 10ft
• Resolution : 0.3 cm
• Measuring Angle: 30 degree
• Trigger Input Pulse width: 10uS
• Dimension: 45mm x 20mm x 15mm

Product Package

• 5 HC-SR04 Ultrasonic Sensors
• 10 Female-Male Dupont Cables
• 10 Female-Female Dupont Cables
• 1 Exquisite package box
• Protected with the thermoplastic film

Product description

SainSmart There are 4 pins out of the module: VCC , Trig, Echo, GND . So it's a very easy interface for controller to use it ranging. The all process is : pull the Trig pin to high level for more than 10us impulse , the module start ranging ; finish ranging , If you find an object in front , Echo pin will be high level , and based on the different distance, it will take the different duration of high level. So we can calculated the distance easily : Distance = ((Duration of high level)*(Sonic : 340m/s))/2

• Using IO trigger for at least 10us high level signal
• The Module automatically sends eight 40 kHz and detect whether there is a pulse signal back
• IF the signal back, through high level ,time of high output IO duration is the time from sending ultrasonic to returning. Test distance = (high level time velocity of sound (340M/S) /2
• Power supply :5V DC, quiescent current : <2mA,effectualangle: <15 ranging distance : 2cm~400 cm resolution : 0.3 cm

User questions & answers

Question:	Does this work with a RPI
Answer:	YES
Question:	What is the range of this device
Answer:	The range of the device depends on the material that it's directed at (because it uses high frequency sound waves, so soft objects generally absorb the sound and make a low return rate) but onto a hard surface, like a wall, the range is generally between 5 - 7 feet. It was a little lower than I expected, but it works for what I've needed. I thought perhaps voltage differences would change the distance, but having used 3v3 and 5v with it, it's pretty consistently a 5 - 7 foot max. If you're wondering, I've found the minimum range to be about 1 inch.
Question:	Has anyone tried triggering multiple sensors with 1 "trigger pin"? I don't see why each sensor would need it's own trigger pin
Answer:	Each sensor has its own timing crystal, so even if multiple sensors are triggered simultaneously, the emissions are produced at slightly different times. Also, multiple sensors should be pointed in different directions to prevent the acoustic signals inteferring with each other.
Question:	Well looks cool... What does it actually do? I don't know what "detector mod distance sensor" means
Answer:	Well , when I tried it , the example from arduino gives back reading of the distance from the sensor to the object right in front of it

Product features

Specifiction:

- Power supply :5V DC

- Quiescent current : <2mA

- Effectual angle: <15°

- Ranging distance : 2cm �500 cm

- Resolution : 0.3 cm

There are 4 pins out of the module : VCC , Trig, Echo, GND.

So it's a very easy interface for controller to use it ranging.

The all process is :

- Pull the Trig pin to high level for more than 10us impulse

- The module start ranging

- Finish ranging

- If you find an object in front

- Echo pin will be high level

- Based on the different distance,it will take the different duration of high level.

Distance = ((Duration of high level)*(Sonic :340m/s))/2

Product description

Excelity HC-SR04 Ultrasonic Moudle is to measure the distance of object by 40KHz ultrasonic sound wave. This moulde provides 2cm-400cm non-contact measurement function, the ranging accuracy can reach to 3mm. It is great for the project that need distance measurement, such as Distometer,intelligent robot navigation system,etc.



Module main technical parameters:

-Working Voltage : 5V(DC)

-Static current: Less than 2mA

-Output signal: Electric frequency signal, high level 5V, low level 0V

-Sensor angle: Not more than 15 degrees

-Detection distance: 2cm-450cm.

-High precision: Up to 0.3cm

-Input trigger signal: 10us TTL impulse

-Echo signal : output TTL PWL signal



Pin definition:

-VCC: connect to 5V DC

-Trig(T): control pin, connect to a standard I/O port

-Echo(R):receiving end, connect to a standard I/O port

-GND: Connect to Ground



Notes:

-1. The module should be inserted in the circuit before been powered to avoid producing high level of misoperation; if producted, power it again.

-2. Before connect to VCC terminal, the GND terminal should be connected the module first,otherwise,it will affect the normal work of the module.



Module Working Principle:

-1. Pull the Trig pin to high level for more than 10us impulse, the module start ranging.

-2. The module automatically sends eight 40KHz square wave to detect whether a signal is returned.

-3. Finished ranging, If you find an object in front, Echo pin will be high level, and based on the different distance, it will take the different duration of high level.

-4. Calculated the distance, the distance = (high level time * sound velocity (340M/S) / 2.



Package included:

-3pcs HC-SR04 Moulde

-3pcs Mounting Bracket

• [PACKAGE INCLUDED] 3pcs HC-SR04 distance measurement module & 3pcs mounting bracket for installation
• [FEATURE] These module is for distance measuring transducer that working with ultrasonic, they consist of ultrasonic transmitter, receiver, and control circui
• [FUNCTIONAL PARAMETER] Effectual Angle: <15 degree ; Detection Distance : 2cm~450 cm ; Resolution : 0.3 cm. Power Supply : 5V DC ; Quiescent Current : <2mA ;
• [UNIVERSAL COMPATIBILITY] Built in standard interface that can be controlled directly by microcontroller，such as 8051, AVR
• [WORKING PRINCIPLE] Using IO trigger for at least 10us high level signal, when triggered it sends out a series of 40KHz ultrasonic pulses and receives echo from an object, the duration of the signal is the time from sending ultrasonic to returning.The distance = (duration time * sound velocity (340M/S) / 2

Product description

When tested objects, the range of area is not less than 0.5 square meters and the plane requests as smooth as possible, otherwise ,it will affect the results of measuring.

• HC-SR04 Ultrasonic Sensor Distance Module: using IO trigger for at least 10us high level signal
• This module has stable performance and accurate measurement distance.
• Detection distance: 0.78~196 in/ (2cm~500cm); High precision: up to 0.12 in/(0.3 cm); Detection angle: <15 °.
• This module is fully Compatible with GH-311 anti-theft module.

User questions & answers

Question:	What are the hole dimensions
Answer:	Exact size I am not sure. But I can just fit a M1.6 screw through the hole.

Product description

Specification：

Electrical parameters: JSN-SR04T

Wiring: + 5V (positive power supply)

Trig (control side) RX

Echo (the receiver) TX

GND (negative)

Module size: 41mm * 28.5mm

Resolution: about 0.5cm

Angle: less than 50 degrees

Working temperature: -10 ~ 70 ℃

Storage temperature: -20 ~ 80 ℃



The basic working principle:

Using IO port TRIG trigger location, to the high level signal of at least 10us;

Module automatically sends 8 40KHz Fang Bo, automatic detecting whether a signal return;

A signal return, a high level is output through the IO port ECHO, the time duration of the high level is ultrasonic from launch to return. The test distance = (high level time * speed of sound (340M/S)) /2;

This module uses the simple method, a control port with a 10US above high level, can wait for high level output at the receiving port. An output can drive the timer, when this port is low can read the timer value,

this time for the location of the time, can be calculated distance. So constantly cycle test, that can achieve the measurement of the value of your mobile.



Package Included:

2* JSN-SR04T Ultrasonic Distance Measuring Transducer Sensor Waterproof

• With a waterproof sealed emitter. This sensor is suitable for outdoor applications such as car reversing sensors, security alarms, industrial inspection, etc.
• Integrated with wire enclosed waterproof probe, suitable for wet, harsh measurement occasions. Please note that the device is waterproof, but it couldn't work underwater.
• Working voltage:DC 5V, Static current:5mA, Total current work: 30mA. Working range: 25cm-4M, Working frequency: 40KHZ, Detecting angle: 70 degree.
• The module has a variety of modes that can be modified manually, suitable for testing and teaching experiments in different occasions.
• Application: Horizontal distance messurement,Obstacle avoidance, automatic control, Traffic control, Security, industrial control.

User questions & answers

Question:	Can i use this with the 3v gpio pin in a rasbperry pi? also, this seems like v3.0 of the product. are there any sample python program to use
Answer:	It works best using 5v and not 3v.

Product description

The ultrasonic sensor has real-world applications, such as security, robotics, and many other distance sensing devices. Use this EV3 sensor to experiment, learn, or create your new prototypes.

• Loose LEGO original goods in a polybag without original packaging and instructions.

User questions & answers

Question:	What is the difference between the IR sensor from the ultrasonic sensor
Answer:	The ultrasonic sensor measures distances to objects - for example to have the EV3 approach an object and stop right in front of it. The IR just detects a signal and reacts in the programmed way.
Question:	is this one better than the ir sensor
Answer:	Choosing your sensor is completely dependant upon your application. There are a lot of limitations in infrared sensors, like the inability to use them in sunlight due to interference. It can make outdoor applications or dark indoor applications very difficult. Ultrasonic sensors work using sound waves, detecting obstacles is not affected by as many factors.  If reliability is an important factor in your sensor selection, ultrasonic sensors are more reliable than IR sensors. If you’re willing to compromise reliability for cost, infrared sensors are ideal for your application.
Question:	Can this device detect a dog whistle
Answer:	No. It only hears its own ultrasound beeps it sends then listens for the echo to see how far away it is from whatever is in front of it. Just like a bat. The process is called echo-location. It should be be called an "echo location sensor." That might be less confusing. Even better call it an "ultrasound distance sensor." It measures distance using ultrasound. It is useless for measuring outside sounds even if they are ultrasound like a dog whistle. In spite of its name that is not what it is for.
Question:	can this detect sound just like a human ear can
Answer:	No, this i a distance sensor, not a sound sensor. There is a Lego NXT sound sensor.

Product description

HC-SR04 Ultrasonic Sensor

Power Supply: 5V DC

Quiescent Current: <2mA

Effectual Angle: ﹤15°

Ranging Distance: 2cm - 500 cm

Resolution: 0.3 cm

Output Signal: Electric frequency signal, high level 5V, low level 0V

Mode of Connection: VCC/ trig(T)/ Echo(R)/ GND (VCC supply 5V, and GND is ground wire. TRIG is trigger control signal input, ECHO is echo signal output.)



Ultrasonic Sensor Module Working Principle

Pull the Trig pin to high level for more than 10us impulse, the module start ranging.



The module automatically sends eight 40KHz square wave to detect whether a signal is returned.



Finished ranging, If you find an object in front, Echo pin will be high level, and based on the different distance, it will take the different duration of high level.



So we can calculated the distance easily. The distance = ((Duration of high level)*(Sonic :340m/s))/2. Distance L = 1/2 x T x C



Package Include:

5 x New Version HC-SR04 Ultrasonic Sensors

3 x Mounting Bracket with Screws

10 x Female-Male Dupont Cables

10 x Female-Female Dupont Cables

• Parameter -- New Version Power Supply: 3.3V -- 5V DC; Quiescent Current: <2mA; Effectual Angle: <15 degree; Detection Distance: 2cm -- 450 cm; Resolution: 0.3 cm.
• Operating Principle: Ultrasonic HC-SR04 distance measuring transducer sensor, it consists of ultrasonic transmitter, receiver, and control circuit.
• HC-SR04 ultrasonic sensor module: Using IO trigger for at least 10us high level signal, when triggered it sends out a series of 40KHz ultrasonic pulses and receives echo from an object, the duration of the signal is the time from sending ultrasonic to returning.
• Test Distance Formula: The distance between the unit and the object is calculated by measuring the traveling time of sound and output it as the width of a TTL pulse, HC-SR04 test distance following formula -- L = 1/2 x T x C (L is the distance, T is the time between the emission and reception, and C is the sonic speed).
• Package Include: 5 x New Version HC-SR04 Ultrasonic Sensors, 3 x Mounting Bracket with Screws, 10 x Female-Male Dupont Cables, 10 x Female-Female Dupont Cables.

Product description

Specifications:

Power Supply :5V DC

Quiescent Current : <2mA

Effectual Angle: <15°

Ranging Distance : 3cm - 400 cm

Resolution : 0.3 cm

Mode of Connection: VCC/ trig(T)/ Echo(R)/ GND

(VCC supply 5V, and GND is ground wire. TRIG is trigger control signal input, ECHO is echo signal output.)

Quantity: 5pcs

Attention:

The module should be inserted in the circuit before been powered to avoid producing high level of misoperation; if produced, power it again.

The module is not suggested to connect directly to electric, if connected electric, the GND terminal should be connected to the module first, otherwise, it will affect the normal work of the module.

When tested objects, the range of area is not less than 0.5 square meters and the plane requests as smooth as possible, otherwise, it will affect the results of measuring.

• The performance of this module is a stable and precise measure of distance.
• Detects whether a signal returns. A signal to return to a high IO output, high duration of the time from launch to return.
• Detection is 3cm-400cm, induction angle is not more than 15 degrees.
• Simple to use, IO trigger ranging to at least 10us high signal.

Product description

This ultrasonic animal chase scares away unwanted animals through the Infrared sensor detects motion and triggers the ultrasonic speaker emitting a mixture of ultrasonic, sonic and powerful flashing LED strobe lights. The irregular and variable frequency makes it more effective to drive away animals.

Why choose us?

1. Effect-5 mode for you to choose so that you have the most effective solution for your particular animals problem.

2. Powerful white flashing LED stroboscopes, wild boars and deer, such larger wild animals will be sensitive to those flashing lights that make it uncomfortable to escape from the protected area.

3.Economic solar energy, charges in the sun, wireless and rechargeable. No additional costs

4.Environmentally friendly: no traps, no dead animals.

Frequency Control Button:

0: OFF

1: Repel animals such as mice, rats, dogs, foxes, martens, etc

2: Repel animals such as cats, raccoons, badgers, skunks, etc

3: Repel animals such as deer, squirrels, cow, etc

4: Alarm and strong LED flashing lights to scare bats, birds, sparrow, pigeon, wild animals

5: Function together mode 1-model 2 –model 3, and turn on strong flashing

Specification:

√ Infrared sensor angle: 110 degrees.

√ Detection range: 8-9 meters depending on animals size (the bigger size, the larger range).

√ Power supply: solar power +3 size rechargeable batteries or adapter.

√ If adapter plugged, the item will keep working, the sensor will not work.

√ If there are a few days as cloudy or rainy, you can charge the item via the adapter.

√ Red LED: indicates the unit is activated.

• ✔ Ultrasonic Animal Chase – the intensive flash light and the high sound pressure with the dynamic high-frequency speaker ensure effective displacement of uninvited guests. Scare cats or other animals such as dogs, foxes, martens, raccoons, rats, mice, badgers, skunks, wild boars, bats, birds, pigeons, rodents etc.
• ✔ Solar powered animal chase – The device is charged by a polysilicon solar panel to store energy for operation in the dark as at night. A 4-hour solar charge will last for 5 days. If it's cloudy or rainy for a few days, the device can be charged via a USB cable.
• ✔ Set Up: Just place the chase pointed towards the area that you want to protect and place it in a place with plenty of sunshine.
• ✔ Adjustable sensitivity and frequency – The motion sensor covers a 110 degree angle left and right, as well as a 55 degree bend up and down, up to a distance of up to 9 m (29.5 ft), which makes the entire range of action approx. 90 m2. There are 5 adjustable ultrasonic strengths that allow the expulsion of different animals depending on the frequency setting.
• ✔ Waterproof and weatherproof – The ultrasonic animal chase with IP64 is waterproof and can be used on rainy days. The unique seal and design allows you to install the device anywhere. Ideal for outdoor use such as gardens, patios, garages, yards, driveways, farms, ponds but also attic floors etc.

User questions & answers

Question:	will this work for the blackstone tailgater
Answer:	Only if your hooking up to a quick connect on the gas end
Question:	Does this connector also fit the lifesmart 17" tabletop griddles #sg270 or #sg270lb, which look similar to the Blackstone 17" griddles
Answer:	Don’t know I have a blackstone
Question:	Is there a version of this quick connect for a Coleman Roadtrip series
Answer:	Thank you for checking in. Yes, Torjik makes an RV Quick-Connect kit compatible with the Coleman Roadtrip LXE, LXX or LX grill. This product will be available on Amazon sometime in April. Currently available at many RV Dealers and online.
Question:	The Canp Chef stove has a similar screw in connector. Will this work with that
Answer:	According to the info provided this fits the blackstone only.

Product description

Specification:

Voltage: DC 5V

The static current: less than 2mA

Level of output: high 5V, low 0V

Sensor angle: less than 15 degrees

Detection distance: 2cm-450cm

Precision: up to 3mm

Weight: about 8.4g

Size: 45*20*15mm/1.77*0.78*0.59in Connection:

VCC, trig(control end), echo(receive terminal), GND



Working principle:

1. Adapting IO trigger range, at least 10 us high level signal.

2. Module automatically sent eight 40 KHZ square wave, automatically detect whether there is signal to return.

3. Have signal returned, output high level through the IO, the duration of the high level is Ultrasonic from launch to return time. Test distance = (high level of time * sound velocity (340 m/S)) / 2.



Package included:

10pcs HC-SR04 ultrasonic measuring sensor module

• Adapting IO trigger range, at least 10us high level signal to detect the distance.
• Detection distance: 2cm-450cm
• Precision: up to 3mm
• Size:45*20*15mm/1.77*0.78*0.59in
• Ideal for Robot obstacle avoidance, object distance measuring, liquid level detection, public security, parking lot detection.

• Quality -- Power Supply : 5V DC ; Quiescent Current : <2mA ; Effectual Angle: <15 degree ; Detection Distance : 2cm~450 cm ; Resolution : 0.3 cm.
• Operating Principle -- Ultrasonic hc-sr04 distance measuring transducer sensor, it consists of ultrasonic transmitter, receiver, and control circuit.
• HC-SR04 ultrasonic sensor module -- Using IO trigger for at least 10us high level signal, when triggered it sends out a series of 40KHz ultrasonic pulses and receives echo from an object, the duration of the signal is the time from sending ultrasonic to returning.
• Test Distance Formula -- The distance between the unit and the object is calculated by measuring the traveling time of sound and output it as the width of a TTL pulse,hc-sr04 test distance following formula -- L = 1/2 × T × C ( L is the distance, T is the time between the emission and reception, and C is the sonic speed )
• Package Include -- 5 X HC-SR04 Ultrasonic Sensors , 10 X Female-Male Dupont Cables , 10 X Female-Female Dupont Cables

Product features

Feature :

• HC-SR04 Ultrasonic Sensor
• Power Supply :5V DC
• Quiescent Current : <2mA
• Effectual Angle: <15°
• Ranging Distance : 2cm - 500 cm
• Resolution : 0.3 cm
• Output Signal: Electric frequency signal, high level 5V, low level 0V
• Mode of Connection: VCC/ trig(T)/ Echo(R)/ GND (VCC supply 5V, and GND is ground wire. TRIG is trigger control signal input, ECHO is echo signal output.)

Ultrasonic Sensor Module Working Principle

Pull the Trig pin to high level for more than 10us impulse, the module start ranging.

The module automatically sends eight 40KHz square wave to detect whether a signal is returned.

Finished ranging, If you find an object in front, Echo pin will be high level, and based on the different distance, it will take the different duration of high level.

So we can calculated the distance easily. The distance = ((Duration of high level)*(Sonic :340m/s))/2. Distance L = 1/2 × T × C

Product description

We strive to put our hundred percent to resolve your issues and try our best to achieve your satisfaction!

About Feedback:

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Component listing:

1pcs LAFVIN R3 Board

1pcs USB cable

1pcs V5.0 extension board

1pcs L298N motor driver board

1pcs Ultrasonic Sensor

1pcs Ultrasonic holder

1pcs Servo motor

1pcs Servo motor fixed plate

1pcs Bluetooth module

3pcs Line tracking module

4pcs Motor

4pcs Wheel

1pcs Remote

1pcs IR Receiver Module

1pcs Cell box

1pcs Black tape

2pcs Acrylic plates

5bag Screws and nuts for every part

1pcs 40pin F-F dupont wire

1pcs Screwdriver

4pcs Bunding belt

2pcs 18650 Battery

1pcs CD with tutorial

• The tutorial include codes,labraries and lessons.It will teach every users how to assembly the smart robot car kit and use R3 controller board, sensors and modules.
• LAFVIN robotic car learning kit is designed for beginners to learn Arduino programming and get hands-on experience on robot design and assembly
• This kit includes R3 Board HC-SR04 Ultrasonic Sensor,V5.0 extension board,Line tracking module,Bluetooth module,etc.
• You will learn the Line Tracking, Ultraviolet Obstacle Avoidance, IR Remote Control, Bluetooth Remote Control of Smart Car, you can also extend other functions on this robot platform.
• This car really excellent and safe to be a perfect gift for your children and friend.

User questions & answers

Question:	Does this come with Arduino borad or have to buy separately
Answer:	Hi,It comes with arduino board,you don't need to buy separetely.
Question:	Does it come with mblock extension so that mblock coding works
Answer:	Hi,It can't work on mblock.
Question:	Does anyone have the link to the online version of the instructions
Answer:	I believe there is a qr code on the cd packaging that links to online resources
Question:	Do you guys have a website where I can download all the stuff from the CD
Answer:	http://www.lafvintech.com/ But the website does not show any links for downloading the CD contents. You may need to contact them about it.