ULTRASONIC SENSOR HC-SR04
DISTANCE MEASURING MODULE
provides 2cm to 400cm of non-contact measurement
Working voltage : 5V(DC)
- Static current: Less than 2mA.
- Output signal: Electric frequency signal, high level 5V, low level 0V.
- Sensor angle: Not more than 15 degrees.
Mode of connection: VCC / trig(T) / echo(R) / GND
Adopt IO trigger through supplying at least 10us sequence of high level signal
The module automatically send eight 40khz square wave and automatically detect whether it receive the returning pulse signal
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