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  • 24/03/2021

    very nice. Good item and fast delivery. I ordered it on the 19th of March and it came on the 24th of March. Will order again if I use these for any permanent projects.

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  • 27/07/2020

    They seem very good in quality, haven't tested yet, the best I've received in 20 days in Rondônia, Bangoog is the best in delivery quality....

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  • 15/12/2021

    They arrived fast and in good condition. I tested just one of them so far but works as expected. Easy to install and easy and to use it.

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  • 30/07/2020

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

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  • 21/11/2019

    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 interference with the next measurement.

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  • 17/09/2022

    Product came well packaged, perfect. Would recommend purchasing.

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  • 30/03/2022

    Items came in time,no damaged modules. This batch I have not connected to power supply but since I've been ordered it before for my friend and everything works just fine.

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  • 18/04/2020

    Cheap and very useful for DIY robots.

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  • 15/04/2020

    nice

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  • 11/03/2020

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

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