Yahboom Ultrasonic Module for Microbit Ranging

Introduction of Ultrasonic module More info for you to download1 Working principleThe ultrasonic module is a sensor that uses ultrasonic characteristics to detect the distance It has two ultrasonic probes for transmitting and receiving ultrasonic waves The range of measurement is 3 450 cm 3 1 Ultrasonic emission and reception schematic 1 You need to input a high level signal of at least 10us to the Trig pin to trigger the ranging function of the ultrasonic module 3 2Ultrasonic module sends trigger signal 2 After the ranging function is triggered the module will automatically send out 8 ultrasonic pulses with 40 kHz and automatically detect whether there is a signal return This step is done internally by the module 3 When the module detects anechosignal theECHOpin will output a high level The high level duration is the time from when the ultrasonic wave is sent to when it returns You can calculate the distance by using the time function to calculate the high level duration Formula Distance High level duration Speed of sound 340M S 2 2 Practical application2 1 Range finder test the distance of the bottom of the well 2 2 Electric toothbrush using ultrasonic to clean the teeth 2 3 Medical ultrasonic flaw detector etc 3 About module3 1 Ultrasonic module possess 4 Alligator clip port Corresponding to GND VCC ECHOand TRIG The TRIG pin is the signal transmit pin and the ECHOpin is the signal receive pin 3 2 4 pin 3 3 PH2 0 cable in