HC-SR04 Ultrasonic Sensor Distance Module: using IO trigger for at least 10us high level signal
The hc-sr04 arduino ultrasonic sensor can send eight 40 kHz and detect whether there is any pulse signal back.If it back, a high level signal will be outputed by IO, and the duration of the signal is the time from sending ultrasonic to returning
Hc-sr04 Test Distance : high level time velocity of sound (340M/S) /2
Hc-sr04 Power Supply : 5V DC; Quiescent Current : <2mA,; Effectual Angle: <15° ; Detection Distance : 2cm~500 cm; Resolution : 0.3 cm
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