HALJIA HC SR04 Ultrasonic Sensor Distance Measuring Module Compatible with Arduino
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Using IO trigger for at least 10us high level signal. Module can send 8 pro 40 kz square wave automatically, and will test if there is any signal returned. 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 velocity (340M/S) / 2 Working Voltage : 5V(DC); Static current: < 2mA; Sensor angle:
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Amazon
Using IO trigger for at least 10us high level signal. Module can send 8 pro 40 kz square wave automatically, and will test if there is any signal returned. 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 velocity (340M/S) / 2 Working Voltage : 5V(DC); Static current: < 2mA; Sensor angle:
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Using IO trigger for at least 10us high level signal. Module can send 8 pro 40 kz square wave automatically, and will test if there is any signal returned. 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 velocity (340M/S) / 2 Working Voltage : 5V(DC); Static current: < 2mA; Sensor angle:
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