HC-SR04,an ultrasonic sensor distance measuring module
Stable, accurate distance measurement
High precision, blind spots (3cm) super close
A full set of ranging process
|Operating Voltage||5V DC|
|Static Current||Less than 2mA|
|Output Signal||Electric frequency signal, high level 5V, low level 0V|
|Sensor Angle||Less than 15 degrees|
|Precision||Up to 3mm|
|Mode of Connection||VCC / trig(T)/echo(R)/GND|
|1x Ultrasonic Ranger module|
|Module Working principle|
Adopt IO trigger through supplying at lea st 10us sequence of high level signal.
The module automatically sends eight 40khz sq uare wave and detects whether the returning pulse signal is received.
If there are returning signals,its throughput reaches high level,high level continuing takes the same time as from ultrasonic transmitting to receiving.