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receiver and control circuit
Operating current: 0
Only three wires are required to communicate with the clock/RAM: CE
Obstacle detection
RFID Tag 125khz small in size
Ultrasonic Sensor ( Distance Measuring Module ) Recorder Module receiver and control circuitIntroduction: HC SR04 ultrasonic module can offer non contact distance sensing function, the range from 2cm to 400cm. and the range accuracy is up to 3mm; the module includes ultrasonic transmitter, receiver and control circuit. The sensor measures distance using sonar; an ultrasonic (well above human hearing) pulse is transmitted from the unit and distance to target is determined by measuring the time required for the echo return. The module is based
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