UF Professor Develops DIY Ventilator 

The video content is so excellent, congratulations

Nice start. A few well-intentioned criticisms: A plan for software is not specified for price, QC, or maintenance. Please do not assume this is a trivial part of the design. Think Boeing. I have doubts about a sprinkler valve cycling 30 times per minute for two weeks without any kind of failure. That would be 1,800 cycles per hour 43,200 cycles per day 302,400 cycles per week for a valve that is meant to cycle once or twice per day about 100 days per year, for, say, twenty years - 4,000 times. The notion that PVC is reliably airtight without glue is weak. The system will be moved, jostled, adjusted, etc. It must be mounted on a mobile stand, with operator access, service access, etc. How will you sterilize everything before and after patient zero? It might be cheaper to use all the plumbing pieces, including valves, once, then replace. How do you dispose of used parts or items used for cleaning? The availability of thousands of Arduinos, valves? The source of the pressurized air is not specified. Filtration of the pressurized air is not specified. There should be at least one moisture trap. A robust power supply must be specified. Capacitor or battery backup? How about a failure monitor? Alarm? The pressure and flow monitoring in the prototype look to be in the lung simulator. Where will they be in the finished machine? The exhaust air will be full of virus. Where does it go? You can't ask a staffer to enter a room full of ventilator exhaust. How do you adjust pressure to achieve desired flow rate at different altitudes? Yours is a crude scientific prototype. Worthy of note, but far from ready for prime time. Next steps should include design for manufacturing, design for testing, part sourcing, assembly plan, service plan, operating manual, including servicing between patients - a hundred practical considerations that will affect the final design of something that is needed by tens of thousands. This critique is from an old engineer (and UF alum) with decades of experience taking brilliant ideas like yours and working through practical realities to develop something robust that can be reliably done in the real world - and with too much time on my hands. I wish you all the best.

the sound is not good I am quite disappointed

you need to adjust the content

Bravo. Are the manufacturers going to clean up the design for actual productions? Also, will the programmers donate their efforts to get this project done? Good work. I'm always proud to be a Gator grad.