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Reference: RBD-1354
Length: 8 inches/20 CM (Long) Material: Copper Plated Pin Spacing: 2.54mm.
Reference: RBD-0351
Contactless transmission of data and supply energy (no battery needed) Operating distance: Up to 100mm (depending on antenna geometry) RoboticsBD Operating frequency: 13.56MHz Data transfer: 106 kbit/s Data integrity: 16 Bit CRC, parity, bit coding bit counting Anticollision Typical ticketing transaction: <100 ms ( including backup management)...
Reference: 0245
Choose your desire Resistor value from below:
Reference: 0031
3 Types Available (Please select from option) 1. Male to Male 2. Male to Female 3. Female-Female
Reference: RBD-0768
Size: 5mm Color: RED Head Shape: Round Lens Appearance: Transparent
Reference: RBD-0761
Breadboard friendly Mounting Style: Through Hole Mounting Direction: Vertical
Reference: 1353
Length: 12.5 inches/30 CM (Long) Material: Copper Plated Pin Spacing: 2.54mm.
Uses ultrasonic sound waves to detect obstacles and measure distance
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The HY-SRF05 Ultrasonic Range Finder Module uses ultrasonic sound waves to detect the presence of and measure the distance to objects in front of it.
The detection and measurement range is from 2 cm up to 450 cm which is about 15 feet with a stated accuracy of ± 2mm. The ultrasonic sound is pulsed at 40 kHz and is not audible to the human ear. The HY-SRF05 is a higher precision version of the HC-SR04, but otherwise is similar in functionality.
These modules are commonly used on robotic vehicles for obstacle detection and avoidance. Because they use sound waves for detection they are not sensitive to light sources or optically reflective surfaces like IR can be. In addition, by using sound instead of light, it is possible to measure the time that it takes for the sound to be echo’d back and therefore the distance to the object can be calculated with a fair amount of accuracy which can be quite handy.
The modules have a ‘view’ of about ±15 degrees, so they are sometimes mounted to a servo motor so that the sensor can ‘look-around’ at its surroundings. The fact that the sensors look like a couple of eyes adds to the cool factor as well.
The way the HY-SRF05 Ultrasonic Range Finder Module works is as follows:
If an echo is not returned (no object detected or signal is blocked), the module will still lower the ECHO pin after a fixed delay. This delay may vary, but is about 200mSec on the modules that I have measured. This is required to prevent the module from hanging if there is no return echo. If you run the test software shown down below and then block the sensor with your hand , you will see what is returned when no obstacle is detected. This is typically something along the lines of 110 feet. To be safe, it is generally best to assume that any reading over about 15 feet is the same as no obstacle being detected.
The speed of sound varies a bit with the air temperature, so for maximum accuracy the air temperature can be measured and used to calculate the current speed of sound, but it is not required for basic collision detection purposes.
There is a 5-pin header on the assembly. The GND pin is connected to the system ground and the Vcc pin is connected to 5V. The TRIG pin is an input pin on which a 10uSec pulse is applied to start the measurement cycle. The ECHO pin is an output pin that is held HIGH for the duration of the time from when the module sends a 40KHz pulse out until it receives the echo back. The OUT pin is not used.
1 x 5 Header
This is a commonly used module for obstacle detection and basic range finding. These are much more capable than the basic IR obstacle avoidance sensors that come in sensor kits and are highly recommended if you are building a motorized robotic car and want to implement a nicely capable obstacle avoidance system or just want to measure distance or presence of an object in front of the sensor for some other reason. The module has a built-in small microprocessor which does all the heavy lifting of managing the ultrasonic sensors.
A similar sensor module that takes care of the of echo timing and temperature measurement for you is the US-100 as shown down below.
The program below implements a basic setup where the measured range is displayed in centimeters, inches and feet. Since the speed of sound varies with the temperature, for maximum accuracy the temperature can be measured and used in the calculation, so this is broken out in the code below but defaults to 20C. It would be straight forward for instance to implement a DS18B20 or LM35 temperature sensor so that the actual temperature can be measured and used in the calculation.
/* * HY-SRF05 Test * * Exercises the ultrasonic range finder module and prints out the current measured distance * VCC - connect to 5V * GND - connect to ground * TRIG - connect to digital pin 12. Can be any digital pin * ECHO - connect to digital pin 13. Can be any digital pin * OUT - Not connected */ const int TRIG_PIN = 12; const int ECHO_PIN = 13; float temp_In_C = 20.0; // Can enter actual air temp here for maximum accuracy or read with sensor float speed_Of_Sound; // Calculated speed of sound based on air temp float distance_Per_uSec; // Distance sound travels in one microsecond at that temp //=============================================================================== // Initialization //=============================================================================== void setup() { pinMode(TRIG_PIN,OUTPUT); pinMode(ECHO_PIN,INPUT); // Formula to calculate speed of sound in meters/sec based on temp speed_Of_Sound = 331.1 +(0.606 * temp_In_C); // Calculate the distance that sound travels in one microsecond in Centimeters distance_Per_uSec = speed_Of_Sound / 10000.0; Serial.begin(9600); } //=============================================================================== // Main //=============================================================================== void loop() { float duration, distanceCm, distanceIn, distanceFt; digitalWrite(TRIG_PIN, HIGH); // Set trigger pin HIGH delayMicroseconds(10); // Hold pin HIGH for 10 uSec digitalWrite(TRIG_PIN, LOW); // Return trigger pin back to LOW again. duration = pulseIn(ECHO_PIN,HIGH); // Measure time in uSec for echo to come back. // convert the time data into a distance in centimeters, inches and feet duration = duration / 2.0; // Divide echo time by 2 to get the time for the sound to travel in one direction distanceCm = duration * distance_Per_uSec; distanceIn = distanceCm / 2.54; distanceFt = distanceIn / 12.0; if (distanceCm <= 0){ Serial.println("Out of range"); } else { Serial.print(duration, 0); Serial.print("uSec, "); Serial.print(distanceCm, 0); Serial.print("cm, "); Serial.print(distanceIn,0); Serial.print("in, "); Serial.print(distanceFt,1); Serial.print("ft, "); Serial.println(); } delay(1000); // Delay between readings }
The board has a 2 small holes that can be used for mounting if desired. There is also a plastic holder available to mount the module as shown below.
The latest price of HY-SRF05 Ultrasonic Range Finder Module in Bangladesh is BDT 220 You can buy the HY-SRF05 Ultrasonic Range Finder Module at best price from our RoboticsBD or visit RoboticsBD Office.
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Reference: RBD-0315
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Reference: RBD-0693
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Reference: RBD-0428
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Uses ultrasonic sound waves to detect obstacles and measure distance
