Aukru 3pcs HC-SR04 Ultrasonic Module Distance Sensor for Arduino UNO Mega R3 Mega2560 Duemilanove Nano Robot Xbee Zigbee
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<b>[Product Information]</b><br>
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<li>Ultrasonic Module HC-SR04 Distance Measuring Transducer Sensor for arduino uno r3, mega, raspberry pi</li>
<li>Working Voltage: 5V DC; quiescent current: < 2mA; effectual angle: less than 15°; distance: 2cm~400cm; resolution: 0.3 cm</li>
<li>Output signal: Electric frequency signal, high level 5V, low level 0V</li>
<li>HC-SR04 consists of ultrasonic transmitter, receiver, and control circuit. When trigged it sends out a series of 40KHz ultrasonic pulses and receives echo from an object.</li>
<li>Test mode :Using IO trigger for high level signal.( Not less that 10us),The Module sends eight 40 kHz automatically and detect whether there is a pulse signal back.</li>
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