3Pcs Geekcreit Ultrasonic Module HC-SR04 Distance Measuring Ranging Transducer Sensor DC 5V 2-450c

Description:

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.
Detection Distance: 2cm-450cm.
High Precision: Up to 0.3cm
Input Trigger Signal: 10us TTL impulse
Ech0 Signal : output TTL PWL signal
Mode of connection:
VCC
trig(T)
ech0(R)
GND

Use Method:

Supply module with 5V, the output will be 5V while obstacle in range, or 0V if not.The out pin of thismodule is used as a switching output when anti-theft module, and without the feet when ranging modules.
Note : the module should be inserted in the circuit before been power, which avoid producing high levelof misoperation;if not, then power again.

Module Working Principle:

1. Adopt IO trigger through supplying at least 10us of high level signal.
2. The module automatically send eight 40khz square wave and automatically detect whether receivethe returning pulse signal.
3. If there is signals returning, through outputting high level and the time of high level continuing isthe time of that from the ultrasonic transmitting to receiving. Test distance =(high level time * sound (340M/S) / 2.

Note:

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

Package Included:

3 x HC-SR04 Ultrasonic Module Distance Measuring Transducer