PAPR powered air purifying respirator
thingiverse
Total parts cost is about $155. Motor from Mouser or Amazon - see below. See Youtube for explanation https://www.youtube.com/playlist?list=PLjBzONrZ6WVaT1RNgtHN4UQJHYrWvwkJ3 Bill of Materials: https://drive.google.com/open?id=1ahUs9ZtMGBLTzg7zXrzDuEUnemJ8hcCJofWkTrry1lw HEPA filter is from a Shark vacuum, part # NV350 Hose is a 22mm CPAP hose with plastic 3/4" npt fittings Motor controller options include simple speed controller/potentiometer https://www.amazon.com/gp/product/B07S35GKB7 And arduino-based pressure controlled using dual barometric pressure sensors (source code open source as well) Motor options https://www.mouser.com/ProductDetail/nmb-technologies/09533ga-12m-at-00/?qs=XN%252belh2ZYYZ9xyQrbxJO5g%3D%3D&countrycode=US¤cycode=USD https://www.amazon.com/gp/product/B00LPUXVWS
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