HC-SR04 SR04 ultrasonic ranging module distance sensor is suitable for Arduino/51/STM32

-1. This module has stable performance and accurate measurement distance.It can be comparable to foreign SRF05 and SRF02 such as SRF02.High -precision modules, blind spots (2cm) exceeding, stable ranging is a powerful basis for the success of this product!

2 Main technical parameters:

1: Use voltage: DC3.3-5V

2: Static current: less than 2mA

3: level output: high 5V

4: level output: bottom 0V

5: Induction angle: not greater than 15 degrees

6: Detection distance: 2cm-450cm

7: High -precision: can reach 0.3cm wiring, VCC, TRIG (control end), Echo (receiving end), GND product use method: A high level of a control port of 10US, you can wait at the receiving port to waitHigh -level output. You can turn on the timer timer when there is output. When this mouth becomes a low -electricity, you can read the value of the timer. At this time, you can calculate the distance for this range.Periodic testing, you can achieve the value of your mobile measurement ~~

Module work principle:

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

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

(3) There is a signal return. Output a high level through IO output, and the high level of duration is the time when the ultrasonic is transmitted from transmitting to the return.Test distance = (high level time*sound speed (340m/s))/2;

The module features:

1: Working Voltage: DC5V
2: QuieScent Curren: 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