PAPR powered air purifying respirator
thingiverse
Total parts cost is approximately $155. The motor can be sourced from Mouser or Amazon, as detailed below. A comprehensive explanation of the project can be found on YouTube at https://www.youtube.com/playlist?list=PLjBzONrZ6WVaT1RNgtHN4UQJHYrWvwkJ3 The bill of materials is available for review at https://drive.google.com/open?id=1ahUs9ZtMGBLTzg7zXrzDuEUnemJ8hcCJofWkTrry1lw A HEPA filter from a Shark vacuum, part number NV350, is utilized in the project. The hose employed is a 22mm CPAP hose with plastic 3/4" npt fittings. Motor controller options include a simple speed controller/potentiometer available on Amazon at https://www.amazon.com/gp/product/B07S35GKB7 Alternatively, an Arduino-based pressure-controlled system can be implemented using dual barometric pressure sensors, with open-source source code also available. The motor is sourced from NMB Technologies, part number 09533GA-12M-AT-00, which can be found on Mouser at https://www.mouser.com/ProductDetail/nmb-technologies/09533ga-12m-at-00/?qs=XN%252belh2ZYYZ9xyQrbxJO5g%3D%3D&countrycode=US¤cycode=USD An alternative motor option is available on Amazon at https://www.amazon.com/gp/product/B00LPUXVWS
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