Specifications:
Sensor uses HX1838, high sensitivity.
Operating voltage 5V.Output form: Digital output.
VCC: 3.3V-5V external voltage (can be directly connected to the 5v microcontroller and 3.3v microcontroller).GND: external GND.IN: external microcontroller I/O port, I/O port has been designed 10K pull-up resistor.
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