1、This module is suitable for Raspberry Pi, etc., stable performance, 2cm blind zone, accurate measurement distance. 2、Suitable for college students, engineers, technicians, factories, DIY electronic enthusiasts, etc. 3、Strict quality control and quality assurance, high safety factor, can be used with peace of mind. 4、Small size, easy to carry and store, convenient to use and with good performance. 5、Using high‑quality materials, strong and durable, has a long service life. Item Type: Ultrasonic Distance Measuring Module Material: Synthetic cardboard Purpose: Accurate ranging, suitable for MCU development board Working Frequency: 40KHz Working Current: 15mA Level Output: 0-5V Induction Angle: ≤15° Range: Approx. 2cm-4meter / 0.8in-13.1ft (peak)High Accuracy: Up to approx. 0.3cm / 0.1in Blind Area: Approx. 2cm / 0.8in Trigger Input Signal: 10uS TTL pulse Output Echo Signal: Output TTL level signal, proportional to range Board Wiring Mode: VCC (input), Trig (control terminal), Echo (receiving terminal), GND (ground) How to Use This Product: A control port sends a high level above 10US, and you can wait for the high level output at the receiving port. Once there is an output, you can start the timer to count, and when the port becomes low, you can read the timing The value of the device, at this time, is the time of this ranging to calculate the distance. Such continuous periodic measurement can get the value of your mobile measurement The Working Principle of Module: (1) Use IO to trigger the ranging and give a high level signal of at least 10us; (2) The module automatically sends 8 40khz square waves and automatically detects whether there is a signal return; (3) There is a signal return, and a high level is output through IO. The duration of the high level is the time from the ultrasonic wave to the return. Test distance = (high level time x speed of sound (340m/s))/2 5 x Ultrasonic Distance Measuring Module 2 x Jump Wire