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Specification
Brand : NovaNic
BulletPoint : 10PC HC-SR04 to world Ultrasonic Wave Detector Ranging Module HC-SR04 HC SR04 HCSR04 Distance Sensor
BulletPoint1 : HY-SRF05 ultrasonic ranging module can provide 2cm-450cm non-contact distance sensing function
BulletPoint2 : 9 ranging accuracy can be as high as 3mm;
BulletPoint3 : the module includes ultrasonic receiver, transmitter and control circuit.
BulletPoint4 : HY-SRF05 ultrasonic module working voltage is DC 5V
BulletPoint5 : Input 10uS TTL pulse signal trigger , Output echo signal is TTL level signal, proportional to range
ExternallyAssignedProductIdentifier : 5393570654045
ExternallyAssignedProductIdentifier1 : 0739319145507
ExternallyAssignedProductIdentifier2 : 739319145507
ItemName : 10PC HC-SR04 to World Ultrasonic Wave Detector Ranging Module HC-SR04 HC SR04 HCSR04 Distance Sensor
ItemPackageQuantity : 1
ItemTypeKeyword : ultrasonic-proximity-sensors
Manufacturer : NovaNic
Material : stone
PartNumber : ZKDRong-10701
ProductDescription : Basic working principle
(1) Use 10-port TRIG to trigger distance measurement, and give a high level signal of at least 10us;
(2) The module automatically sends 8 40khz square waves, and automatically detects whether there is a signal return;
(3) When there is a signal return, a high level is output through the 10-port ECHO. The duration of the high level is the time from the ultrasonic wave to the return. Test distance = (high level time * speed of sound (340M/S)) /2.

Parameter
Electrical parameters: HY-SRF05 ultrasonic module
Working voltage: DC 5V
Working current: 15mA
Working frequency: 40Hz
Long range: 4.5m
Close range: 2cm
Measuring angle: 15 degrees
Input trigger signal: 10uS TTL pulse
Output echo signal: output TTL level signal, proportional to range
Size: 45*20* 1 5mm

Pin definition
VCC for 5V power supply
GND is the ground wire,
TRIG trigger control, signal input,
ECHO echo signal output
OUT switch output) (used as an alarm module)

Ultrasound timing chart
The above sequence diagram shows that you only need to provide a pulse trigger signal above 10uS, and the module will send out 8 40kHz cycle levels and detect echoes.
Once the echo signal is detected, the echo signal is output. The pulse width of the echo signal is proportional to the measured distance.
Therefore, the distance can be calculated from the time interval between the transmitted signal and the received echo signal. Formula: uS/58=cm or uS/148=inch; or: distance = high level time * speed of sound (340M/S) /2;
Note: 1. This module should not be connected with electricity. If you want to connect with electricity, please connect the GND terminal of the module first, otherwise it will affect the normal operation of the module.
2. When measuring the distance, the area of the measured object is not less than 0.5 square meters and the plane should be as flat as possible.

ProductSiteLaunchDate : 2021-05-26T18:21:21.178Z