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74HC195 is a high speed 4-bit SHIFTREGISTER utilizes advanced silicon-gate CMOS technolo-gy to achieve the low power consumption and high noiseimmunity of standard CMOS integrated circuits
The pin can also be attached to a digital output on the MCU and turned on/off when samples are being taken
and the buckled card slot is perfectly designed
Operating voltage : 3
Pulse Oximeter SpO2 - Heart-Rate Sensor (MAX30102) Sharp IR Proximity 74HC195 is a high speedIntroduction : MAX30102 based pulse oximetry and heart rate monitor breakout board. It includes internal LEDs, photodetectors, optical elements, and low noise electronics with ambient light rejection. The MAX30102 provides a complete system solution to ease the design in process for The device has two LEDs, one emitting red light, another emitting infrared light. For pulse rate, only the infrared light is needed. Both the red light and infrared light
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