Internet of Things » Sensor » IOT-HC-SR04
HC-SR04 Ultrasonic Module Distance Measuring Transducer Sensor
[IOT-HC-SR04]
Price: 1,40€
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HC-SR04 Ultrasonic Module Distance Measuring Transducer Sensor

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Product features: 

Ultrasonic ranging module HC - SR04 provides 2cm - 400cm non-contact measurement function, the ranging accuracy can reach to 3mm. 

The modules includes ultrasonic transmitters, receiver and control circuit. 

The basic principle of work: 
   (1) Using IO trigger for at least 10us high level signal, 
   (2) The Module automatically sends eight 40 kHz and detect whether there is a pulse signal back. 
   (3) 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,

Specifications
Working voltage: 5V
Working Current: 15mA
Working Frequency: 40Hz
Max Range: 4m
Min Range: 2cm
Measuring Angle: 15 degree
Rectifier: Non-Synchronous Rectification
Trigger Input Signal: 10uS TTL pulse
Echo Output Signal: Input TTL lever signal and the range in proportion
Sizeļ¼š 45*20*15mm

Additional Images:

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