20Pcs Geekcreit® Ultrasonic Module HC-SR04 Distance Measuring Ranging Transducers Sensor DC 5V 2-450cm

Description Working Voltage 5V DC Static Current Less than 2mA Output Signal Electric frequency signal high level 5V low level 0V Sensor Angle Not more than 15 degrees Detection Distance 2cm 450cm High Precision Up to 0 3cmInput Trigger Signal 10us TTL impulseSignal output TTL PWL signalMode of connection VCCtrig T ech0 R GNDUse Method Supply module with 5V the output will be 5V while obstacle in range or 0V if not The out pin of this module is used as a switching output when anti theft module and without the feet when ranging modules Note the module should be inserted in the circuit before been power which avoid producing high level of misoperation if not then power again Module Working Principle 1 Adopt IO trigger through supplying at least 10us of high level signal 2 The module automatically send eight 40khz square wave and automatically detect whether receive the returning pulse signal 3 If there is signals returning through outputting high level and the time of high level continuing is the time of that from the ultrasonic transmitting to receiving Test distance high level time sound 340M S 2 Note This module is not suitable to connect with electric power if you need to connect this module with electronic power then let the GND terminal of this module to be connected first otherwise it will affect the normal work of the modulePackage Included 20 x HC SR04 Ultrasonic Module Distance Measuring Transducer