HC-SR04 Ultrasonic Distance Measuring Transducer Sensor Module for Arduino

Description

HC-SR04 Ultrasonic Distance Measuring Transducer Sensor
Module
for Arduino
The HC-SR04 ultrasonic sensor uses sonar to determine the distance to an object, just like bats do. It offers excellent non-contact range detection with high accuracy and stable readings from 2 cm to 400 cm (1 inch to 13 feet) with an accuracy of 3mm, in an easy-to-use package. Its operation is not affected by sunlight or black material like optical rangefinders are (although acoustically soft materials like cloth can be difficult to detect). The HC-SR04 comes complete with an integrated ultrasonic transmitter and receiver.
Product Specifications:
Working Voltage: 5 VDC
Static current: Less than 2mA.\
Output signal: Electrical frequency signal, high level 5V, low level 0V
Sensor angle: Not more than 15 degrees
Detection distance: 2cm - 400cm
Accuracy: Up to 3mm
Input trigger signal: 10us TTL impulse
Echo signal : Output TTL PWL signal
Item size: 44mm * 20mm * 15mm
Net weight: 11grams
Mode of connection:
VCC: 5V DC
supply input
Trigger (T): C
ontrol signal input (
10us TTL impulse
)
Echo (R): E
cho signal output, duration is time from transmit to receive
Ground GND: Ground wire
HC-SR04 Ultrasonic Module Operation:
Supply module with 5V, the Echo (R) output will be 5V while obstacle is in range, or 0V if it is not. Duration of Echo signal is used to calculate distance to object (see below).
Use the IO port Trigger (T) to trigger ranging by applying a 10 us high level (TTL) trigger signal. The m
odule will send an output square wave signal through its output acoustic transducer automatically, and will test if there is any signal returned to its input acoustic sensor.
If there is an acoustic signal returned, The ECHO (R) IO port will have a high level signal. The duration of the high level signal is the time from transmit to receive using the ultrasonic transducers.
Distance to object from module = Duration of ECHO (R) high level signal * sound velocity (340m/s) / 2
Package includes:
1 x Arduino Ultrasonic Module HC-SR04 Distance Sensor
Printed specifications and operational documentation
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