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A project log for Open-source USB CPAP machine

Breathe free, night and day.

indigoredsterindigoredster 04/21/2018 at 19:330 Comments

reminder.... "Remind me to take a photograph of it and post it here. "

I just go approved for medical on my cpap, so now I can compare the DIY I 'm making w/ the one I will get fitted with.  

I ordered a mask:

https://www.amazon.com/gp/product/B079F69D88/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

and (erroneously) a fan that barely meets the specs just to evaluate: 

 https://www.amazon.com/gp/product/B01CSNEO2G/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

Brushless Radial Blower - UTUO DUAL Ball Bearing High Speed 12V DC Centrifugal Fan with XH-2.5 Plug 120mm by 120mm by 32mm (4.72x4.72x1.26 inch)

From Wikipedia: The pressure required by most patients with sleep apnea ranges between 6 and 14 cmH2O. A typical CPAP machine can deliver pressures between 4 and 20 cmH2O. More specialised units can deliver pressures up to 25 or 30 cmH2O. CPAP treatment can be highly effective in treatment of obstructive sleep apnea.

The motor 

The real cpap motors look to be similar to RC motors and ESC's. Should be easily 3d printed:

-Lee

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