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An ultrasonic range finder module ideal for use in distance measurement projects and obstacle avoidence robots. Ideal for Arduino and other development systems. More accurate than the HC-SR04.
Module main technical parameters:
1.Working Voltage : 5V(DC)
2.2mA.Static current: Less than
3.Output signal: frequency signal, high level 5V, low level 0V.
4.Sensor angle: Not more than 15 degrees.
5.Detection distance: 2cm-450cm.
6.High precision: Up to 0.2cm
7.Input trigger signal: 10us TTL impulse
8.Echo signal : output TTL PWL signal
Connections:
1.VCC
2.trig(T)
3.echo(R)
4.OUT
5.GND
Note : the module should be inserted in the circuit before being power, which avoids producing high level of misoperation;if not, then power again.
Module Working Principle:
1.Provide I10us pulse TTL signal to "trig" input.
2.The module automatically sends eight 40khz square wave and automatically detects whether a reflected pulse is received.
3.If there is signals returning, an output on the "ehco" output of a high level. The on period determins the distance
Test distance = (high level time * sound velocity (340M/S) / 2.
