5Pcs Geekcreit® Ultrasonic Module HC-SR04 Distance Measuring Ranging Transducer Sensor DC 5V 2-450cm
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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.
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....
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.
All the pins are looking perfect and not bent!!! That’s great and I’ve tested the components, they work!!!
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.
Product came well packaged, perfect. Would recommend purchasing.
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.
Cheap and very useful for DIY robots.
nice
Fast delivery from UK warehouse. Works as expected. Quality is ok. I recommend.