The HC-SR04 ultrasonic ranging module sensor supports 3.3V-5V compatible with UNO R3 51 STM32

 

Color classification: A: HC-SR04 new version wide voltage 3-5·5V / B:HC-SR04 old version 5V / C:HC-SR04 Single chip wide voltage 3-5·5V

Output Model Category: Analog Sensor

Working principle: vacuum sensor

Sensor category: Position sensor

 

Main technical parameters:

1: Operating voltage: DC5V 2: Quiescent current: less than 2mA

3: Level output: high 5V

4: Level output: bottom 0V

5: Sensing angle: not more than 15 degrees

6: Detection distance: 2cm-450cm

7: High precision: up to 0.3cm

 

On-board wiring method, VCC, trig (control end), echo (receiving end), out (empty foot), GND

 

Note: The TRIP pin is an internal pull-up resistor of 10K, pull the TRIP pin low with the IO port of the single-chip microcomputer, and then give a pulse signal above 10us.

The OUT pin is the switching output pin when this module is used as an anti-theft module, and the ranging module does not use this pin!

 

Note: The module should be plugged in on the circuit board before powering on to avoid high-level misoperation, if generated, power can be re-energized.

 

This module can provide ranging programs: C51, PIC18F877, Yilong microcontroller, three MCU test references.

 

How the URF04 module works:

 

(1) Use IO to trigger ranging and give at least 10us a high-level signal;

 

(2) The module automatically sends 8 square waves of 40kHz and automatically detects whether there is a signal return;

 

(3) There is a signal return, through IO output a high level, the time of high level is the time from the emission of the ultrasonic wave to the return.

 

Test distance = (high level time * sound velocity (340M/S))/2;

 

This product is simple to use, a control port sends a high level of more than 10US, you can wait for the high level output at the receiving port. As soon as there is an output, the timer can be turned on, and when this port becomes low, the value of the timer can be read, and the time of this ranging can be calculated. Such a continuous periodic measurement, you can reach the value of your mobile measurement ~~

 

How the module works:

(1) Use IO to trigger ranging and give at least 10us a high-level signal;

 

(2) The module automatically sends 8 square waves of 40kHz and automatically detects whether there is a signal return;

 

(3) There is a signal return, through the IO output a high level, the high level lasts for a time