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a watchdog timer
It has 4 pin SWIM connector on board for In Serial Programming (ISP) which you can access with ST link flash tool
you will need an IDE (Integrated Development Environment
Connect VCC-A to 3
CR2032 battery backup with two to three year life
MAX30100/30102 Heart Rate Oxygen Pulse Sensor AA Battery a watchdog timerThis is MAX30100 30102 based Heart rate sensor. This works on a principle called photo plethysmography, which means the changes in the volume of blood in an organ is measured by the changes in the intensity of the light passing through that organ hence the emitted light from the LED will be received by photosensor only when there is blood in the vein hence measuring the pulse. The output signal is further conditioned and filtered to give the final
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