Original spot ultrasonic ranging module HC-SR04 ultrasonic sensor quality assurance

Product Descriptions：

1. This module has stable performance and measures distance. Can be comparable to foreign ultrasonic ranging modules such as SRF05 and SRF02. The high precision of the module, the ultra close blind spot (2cm), and stable distance measurement are the powerful basis for the successful entry of this product into the market!

2 Main technical parameters:

        1: Operating voltage: DC5V          2: Static current: less than 2mA
        3: Level output: High 5V           4: Level output: Bottom 0V
        5: Sensing angle: not greater than 15 degrees        6: Detection distance: 2cm-450cm      

     7: High precision: up to 0.3cm

      8. PCB board size: 4.5 * 2.0CM

Wiring method, VCC, trib (control terminal), echo (receiver terminal), GND

Instructions for using this product: If one control port sends a high level of 10US or more, 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 to start counting. When this port becomes low, the timer value can be read, which is the time for this distance measurement and the distance can be calculated By continuously conducting periodic measurements like this, you can achieve the value you measured while moving~~

Module working principle:

　　   (1) Using IO triggered ranging to provide a high-level signal of at least 10us;

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

　　　 (3) A signal is returned, and a high level is output through IO. The duration of the high level is

          The time from emission to return of ultrasonic waves. Test distance=(high-level time * sound speed (340M/S))/2;  

This module can provide a complete set of ranging programs: C51, PIC18F877, ultrasonic LCD1602 display, ultrasonic LCD12864 display, digital tube display, serial port display, etc., ranging reference program.