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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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  • 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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  • 09/04/2018

    Ein Teil dieser Ultra Sonic Senoren habe ich bei meinen Roboter Projekten ein gesetzt. Da leisten sie ausgezeichnete Dienste. Das Modul ist passgenau gearbeitet und fügt sich ohne Probleme in die Bausätze ein. Empfehlenswertes Produkt. ------------------------------------------------------------------------------------------------- I have used a part of these Ultra Sonic Senoren in my robot projects. They do an excellent job. The module is made to fit perfectly and fits easily into the kits. Recommended product.

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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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  • 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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  • 15/04/2020

    nice

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  • 06/11/2019

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

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  • 11/10/2019

    fast delivery nice soldering work very satisfied

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  • 18/04/2020

    Cheap and very useful for DIY robots.

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  • 11/03/2020

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

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