This module is fully compatible with ARDUINO single-chip microcomputer, and its connection port is also compatible with Arduino sensor expansion board. This module mainly includes infrared transmitter and photosensitive receiver. The infrared transmitter is on one side of the finger, and the photosensitive receiver is on the other side of the finger; the photosensitive receiver is used to obtain the emitted luminous flux; when the blood pressure pulse passes through the finger, the resistance of the photosensitive receiver changes slightly. The module comes with 4 positioning holes, which is convenient for you to fix the module to other devices.
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