Geekcreit® Moduł ultradźwiękowy HC-SR04 czujnik pomiaru odległości 5V DC 2-450cm
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Build quality is acceptable - works nicely - measurements are repeatable. Trig pin has pull-up resistor to 5V, and Echo pin is push-pull, so i recommend using level conversion when interfacing to e.g 3.3V FPGA (Sensor did not work well with 3.3 supply voltage) Price/Function ratio is good, almost excellent.
I purchased 10 of these for several projects I am working on. At first I was worried because they were very affordable, I didn't expect much. Once they arrived, I could see the quality was fantastic. They are also very accurate, well exceeding my expectations. For anyone interested, I created an Arduino library for it and put on GitHub - https://github.com/dan-power/Arduino-HC-SR04
Pros: Quite easy to figure out without any documentation, all the pins are either well-labeled or obvious. Good quality for the price.Also it is really small so it could be hidden if you wanted to. Cons: None that I can think of... Work right away and compatible with arduino, mbed and all kind of other mircocontroller boards. I don't have any cons till now and I can not think of any. Especially for this price!!! Other: Easy to interface to my Arduino, good deal. I will recommend this to friends.
je ne peux pas encore commenté sur sa durée de vie. mais ce produit fonctionne très bien pour moi l'image sur le site parrait plus grande mais sa s'adapte bien a mon projet. 2 point a souligné ; a 400m 9 reponse sur 10 est bonne si votre système n'utilise pas de batterie relier le GND a la terre sinon ca va vaciller.
Ten moduł będzie używany do wykrywania obecności aktywowania respiratora w temperaturze pokojowej powyżej 22C. Jest to możliwe po podłączeniu tego czujnika do płyty esp i zintegrowaniu go z asystentem domowym, gdzie automatyka jest tworzona i konserwowana. Ten moduł jest wysokiej jakości i polecam go wszystkim.
produto de boa qualidade eu recomendo e entrega rápida
Niesamowity produkt polecam go 👌
good very nice
Cheap price, and quite precise range measurement. Nice deal.
It's very accurate and its quality is fantastic It is very suitable for robot projects and alarms It has been successfully tested