20Pcs Geekcreit® Ultrasonic Module HC-SR04 Distance Measuring Ranging Transducers Sensor DC 5V 2-450cm COD

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Description:


Static Current: Less than 2mA.

Sensor Angle: Not more than 15 degrees.

High Precision: Up to 0.3cm

Signal : output TTL PWL signal

VCC

ech0(R)


Use Method:


Note : the module should be inserted in the circuit before been power, which avoid producing high level of misoperation;if not, then power again.



1. Adopt IO trigger through supplying at least 10us of high level signal.

3. If there is signals returning, through outputting high level and the time of high level continuing is the time of that from the ultrasonic transmitting to receiving. Test distance =(high level time * sound (340M/S) / 2.



This module is not suitable to connect with electric power, if you need to connect this module with electronic power,then let the GND terminal of this module to be connected first,otherwise, it will affect the normal work of the module



20 x HC-SR04 Ultrasonic Module Distance Measuring Transducer