■在庫はない場合は、通常5～10日以内に発送。販売元直送の場合もあります、発送後に追跡番号を発行。 納品日数は最大10-15日の場合もあります。<br/>■初期不良・不良品による返品・交換(3日内)の返品送料はお客様負担となります。<br/>Geekcreit Ultrasonic Module HC-SR04 Distance Measuring Ranging Transducer Sensor DC 5V 2-450cm<br/><br/><br/>Description:<br/>Working Voltage : 5V(DC)<br/>Static Current: Less than 2mA.<br/>Output Signal: Electric frequency signal  high level 5V  low level 0V.<br/>Sensor Angle: Not more than 15 degrees.<br/>Detection Distance: 2cm-450cm.<br/>High Precision: Up to 0.3cm<br/>Input Trigger Signal: 10us TTL impulse<br/>Echo Signal : output TTL PWL signal<br/>Mode of connection:<br/>VCC<br/>trig(T)<br/>echo(R)<br/>GND<br/><br/>Use method:<br/><br/>Supply module with 5V  the output will be 5V while obstacle in range  or 0V if not.The out pin of this<br/>module is used as a switching output when anti-theft module  and without the feet when ranging modules.<br/>Note : the module should be inserted in the circuit before been power  which avoid producing high level<br/>of misoperation;if not  then power again.<br/><br/>Module Working Principle:<br/><br/>1. Adopt IO trigger through supplying at least 10us sequence of high level signal.<br/>2. The module automatically send eight 40khz square wave and automatically detect whether receive<br/>the returning pulse signal.<br/>3. If there is signals returning  through outputting high level and the time of high level continuing is<br/>the time of that from the ultrasonic transmitting to receiving. Test distance =(high level time * sound velocity (340M/S) / 2.<br/><br/>Note : <br/><br/>This module is not suitable to connect with electric power  if you need to connect this module with<br/>electronic power then let the GND terminal of this module to be connected first otherwise  it will affect the<br/>normal work of the module<br/><br/>Package Included:<br/><br/>1 x HC-SR04 Ultrasonic Module Distance Measuring Transducer