Description: 

US-020 ultrasonic ranging module can be achieved 2cm-7m non-contact measuring function, power supply voltage of 5V, static power consumption is lower than 3mA, support GPIO communication mode, with a watchdog, stable and reliable work.

The main technical parameters

Electrical parameters  US-020 ultrasonic ranging module

Working voltage DC 5V

Static current  3mA

Working temperature  0 - 70 degrees

Output mode GPIO

Induction of less than 15 degrees angle

Detection distance 2cm-700cm

Detection precision  0.3cm+1%

This module size: 45mm*20mm*1.6mm.Plate two with a radius of 1mm mechanical hole, 






The module size: 45mm * 20mm * 1.6mm. Board has two holes of 1mm radius machinery

From left to right: 1,2,3,4.They are defined as follows:

1 Pin: VCC power (DC 5V).

2 Pin: external circuit Trig terminal, to this pin input a 10uS above high level, can trigger module location.

3 Pin: external circuit Echo terminal, when the distance at the end, this pin will output a high level, level width for the ultrasonic travel time of the sum

 4 Pin: to  external circuit  GND

Ranging principle

Module range timing 

Chart shows that: in Trig only need to input a 10US tube feet above the high level, the system can send out 8 40KHZ ultrasonic pulse echo signals, and then detecting.When the detected echo signal, through the Echo pin.

According to the Echo pin output high level duration can be computed distance value.The distance value (high level time: /2 *340m/s).