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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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  • 2020-07-27 15:43:51

    Parecem muito bons na qualidade, não testei ainda, o melhor que recebi em 20 dias em Rondônia, Bangoog é a melhor na qualidade de entrega....

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  • 2020-07-30 11:15:07

    All the pins are looking perfect and not bent!!! That’s great and I’ve tested the components, they work!!!

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  • 2020-04-15 09:12:44

    nice

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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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  • 2020-04-18 23:20:00

    Cheap and very useful for DIY robots.

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  • smesoft
    CZ
    2020-03-11 13:08:13

    Fast delivery from UK warehouse. Works as expected. Quality is ok. I recommend.

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  • LYPICH
    KH
    2020-02-15 06:43:15

    Good.

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  • 2020-01-10 13:03:35

    Parfait état, bon emballage, correspond à mes attentes

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  • 2019-12-05 07:46:42

    Muito bom, chegou antes do previsto

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