Back to the design description, the D13 signal output pin (TP4), which is logic-low (L) by default, shifts to a logic-high (H) state for a while when an object appears within sight of the infrared ...

Posted in Medical Hacks Tagged arduino, audio, ble, copd, cough, data, machine learning, medical, TinyML ← Getting To The Heart Of A Baofeng Rapid Prototyping To Measure Turbidity In Rapids → ...

If you aren’t up on pollution metrics, PM2.5 is a count of very fine particles (under 2.5 microns) and PM10 is a count of particles for 10 microns. You can find a datasheet for the device online.