Cartoon ultrasonic HC - SR04 sensor fixed bracket
The main technical parameters: 1. The use of voltage: DC5V 2. Static electricity: less than 2 ma 4:3: high level output: 5 v output level: low 0 v 5: induction Angle: no more than 15 degrees 6: detection range: 7:2 cm - 450 cm high precision: up to 3 mm Connection mode, the VCC, trig (control), ground echo (receiver), GND This product use: a mouth sends a high level of more than ten us, can receive the mouth for high level output. There is a To be able to open the timer timing output, when the mouth into a low electricity at ordinary times you can read the value of the timer is here for the distance of time, Can calculate the distance. So constantly cycle test, you can reach your mobile measuring the value of the ~ ~ Working principle of the module: (1) the IO trigger range, high level signal for at least 10 us; (2) module automatically sent eight 40 KHZ square wave, automatically detect whether there is signal to return; (3) have returned signal, through the IO output high level, the duration of the high level is Ultrasonic from launch to return time. = test distance (high level of time * sound velocity (340 m/S)) / 2; This module can provide a full range of ranging program: C51, PIC18F877, ultrasonic LCD1602 display, ultrasonic LCD12864 display, digital tube display, serial interface display, ranging reference program.
