5PCS Ultrasonic Sensor Module HCSR04 Distance Measuring Sensor for Arduino SR04

Feature: 1.Main technical parameters: Voltage: DC 5V Static current: less than 2mA Electrical level output: 5V high Electrical level output: at the end of 0V Induction angle: not more than 15 degrees Detection distance: 2cm-450cm High precision: 2mm Wiring: VCC, trig (control side), echo (receiving end), GND 2.Module works: using IO trigger distance, the high signal to at least 10us module automatically sends eight 40khz square wave, automatically detects whether a signal return; a signal back, through the IO output a high electrical level, high electrical level duration is: the ultrasound time from launch to return. Test distance = (time of the high electrical level * speed of sound (340M / S)) / 2; Package Included: 5 x Ultrasonic Sensor Module HC-SR04 Distance Measuring Sensor For Arduino