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Ultrasonic distance measurement module HC-SR04

  • Model: HC-SR04
  • Shipping Weight: 0.03kg
  • Units in Stock: 5000

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Min:  20
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1. this module has stable performance, accurate measurement range. Can be comparable with foreign SRF05, SRF02 and other ultrasonic ranging module. Module high precision, blind area (2cm) ultra near, stable ranging is the product of this success to the market's strong! This module fully modest capacity GH-311 security module

2 main technical parameters:

1: the use of voltage: DC5V 2: static current: less than 2mA

3: level output: high 5V 4: level output: bottom 0V

5: induction angle: no more than 15 degrees 6: detection distance: 2cm-450cm

7: high precision: up to 0.3cm

Board connection mode, VCC, trig (control side), echo (receiver), out (empty), GND

Note: the TRIP pin is an internal pull up resistor on the 10K, using the IO port of the microcontroller to pull the TRIP pin low, and then give a pulse signal above 10us.

OUT pin for this module as the anti-theft module when the switch output pin, ranging module do not have this pin!

Note: the module should be plugged in the circuit board to be re energized, to avoid generating a high level of error, if produced, re energized to solve the problem.

This module can provide ranging program: C51, PIC18F877, Yi Long single chip, three kinds of MCU test reference.

3, URF04 module working principle:

(1) using IO trigger ranging, to at least 10us of the high level signal;

(2) module automatically sent 8 40KHz Fang Bo, automatic detection of whether there is a signal to return;

(3) there is a signal to return, through the output of a high level of IO, the duration of the high level is the time from the launch of the ultrasonic wave back.

Test distance = (high time * speed of sound (340M/S)) /2;

The product easy to use, a control port a 10US more than the high level, you can wait for high output level in the receiving port. A output can open the timer, when the port is low you can usually read the timer value. At this point, we the ranging time, calculate the distance. This constant cycle detection, you can reach your mobile measurement value ~ ~

Module working principle:

(1) using IO trigger ranging, to at least 10us of the high level signal;

(2) module automatically sent 8 40KHz Fang Bo, automatic detection of whether there is a signal to return;

(3) have a signal to return, through the IO output a high level, high level of time is

Ultrasonic wave from the time of return to return. Test distance = (high level time * sound speed (340M/S)) /2;