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    2019-11-21 19:53:45

    The HC-SR04 sensor has 4 pins: Vcc (+ 5V), Trigger, Echo, GND. It sends a high pulse on the Trigger pin for at least 10 microseconds, at this point the sensor will send the sound ping and wait for the return of the reflected waves, the sensor will respond on the Echo pin with a high pulse of the duration corresponding to the travel of sound waves , after 38 milliseconds it is considered that no obstacle has been encountered. For safety we generally expect 50-60 millisecs to ensure that there is no

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    2019-12-05 07:46:42

    Muito bom, chegou antes do previsto

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    2019-11-06 12:49:43

    Very nice set of ultrasonic sensor modules. Easy to use and connect.

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    2019-10-23 03:06:51

    Everything is in order. Thank you very much.

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    2019-10-11 11:08:02

    fast delivery nice soldering work very satisfied

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    2019-05-19 16:15:24

    good quality,Nice packing ,and very Quick deliverd,thanks banggood

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    2019-01-30 11:08:10

    Alles gut

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    2019-04-12 21:00:16

    Cegou tudo ok, bom aspecto e qualidade. Arrived everything ok, good looking and quality.

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