HC-SR04 SR04 Ultrasonic Ranging Module Distance Sensor Compatible With Arduino/51/STM32

-1、This module has stable performance and accurate distance measurement.Comparable to foreign ultrasonic ranging modules like SRF05 and SRF02. The module has high precision; its blind spot (2cm) is ultra-narrow and stable distance measurement is a strong basis for this product's successful market entry!

2 Main Technical Parameters:     

1: Operating Voltage: DC3.3-5V       

2: Quiescent current: less than 2mA   

3: Level output: high 5V       

4: Level output: bottom0V       

5: Sensor angle: no more than 15 degrees    

6: Detection distance: 2cm-450cm          

7: High precision: up to 0.3cm wiring method, VCC, trig (control pin),  echo (receiver), GND How to use this product: Send a high level of more than 10US to the control port, and wait for the high level output at the receiving port. Once there is output, you can start the timer for timing. When this port changes to low level, you can read the timer value, which is the time for this ranging, and then calculate the distance. By continuously measuring in cycles like this, you can achieve the value of your moving measurement~~

Module operation principle:   

(1) Use IO trigger ranging, provide at least 10us high-level signal;     

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

(3) When there is a signal return, a high level is output through IO. The duration of the high level is the time from ultrasonic emission to return. Testing distance = (high level duration * sound speed (340M/S))/2;

The module features:

1: Working 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 range: 2cm-450cm
7: High precision: up to 0.3cm