Measuring Physiology with the Adafruit Feather Adalogger #Feather #Adafruit #NeoPixels @Instructables @Adafruit
Via Instructables: rabbitcreek writes about using an inexpensive microcontroller and a sensor to monitor breathing.
I needed a microcontroller-sensor that would do this. Published methods of sensing a breath have included a expanding force sensor around your midsection, a temp probe that works on exhaled air being warmer than inhaled stuff, and sip/blow switches available on quadriplegic control units and strange laser sensors that look at patients expanding girth while in MRI machines.
The easy method settled on was an analogue thin-film sensor for detecting relative pressure differences that occur with rising water levels in washing machines. With a little bit of data tinkering the very sensitive unit is able to detect the subtle uptick in pressure that accompanies exhalation in a monitored space.
This project is fairly simple in construction. It involves a Analog read with a microcontroller, a sensor, a lipo battery for power and a neopixel stick and SD card for output. The absolute size of the unit can be reduced further if you want to forgo the card output and downsize the battery.
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