How to use HC-SR04 Ultrasonic Sensor with Arduino&Raspberry Pi
SunFounder HC-SR04 consists of ultrasonic transmitter, receiver, and control circuit. Mode of Connection: VCC/ trig(T)/ Echo(R)/ GND (VCC supply 5V, and GND is ground wire. TRIG is trigger control signal input, ECHO is echo signal output.)
HC-SR04 Ultrasonic Sensor Distance Module: using IO trigger for at least 10us high level signal
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