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Topic: HC-SR04 battery error (Read 175 times) previous topic - next topic

mateusguilherme

Hi

I have HC-SR04+Arduino+Battery 9v.... but with battery+Arduino the sensor HC-SR04  makes wrong measurements... with cable USB+Arduino it works perfectly....

What could be happening?





knut_ny

Ny

mateusguilherme

Thanks

I solved the problem put resistor 20k pin Echo

 

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