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I'm looking at the enclosure requirements.? I understand from Gordon that commercial ventilators use some variation of Luer Lock fittings. Does anyone know definitively what kind of fitting we should

Jack has covered both the issues. I use the chinese arduino nanos all the time. we flew three of them to space. they are reliable. they mostly have a problem with the drivers. - f [email protected]>

Thank you . That is basically identical to what the FDA is sending out (which is enclosed)

This might be of interest.. a draft copy of Emergency Use Ventilator Design Guidance from the Association for the Advancement of Medical Instrumentation (AAMI).

The two most common problems are not having the CH340 driver installed. Try: HobbyComponents/CH340-Drivers | | | | | | | | | | | HobbyComponents/CH340-Drivers CH340 Drivers for Hobby Components

Hi Marcello, I am moving in the direction of a stepper motor (no pun intended) to drive my bellows pump. Unfortunately, I am involved in too many things now and Still waiting for some parts. Here are

https://github.com/CSSALTlab/Open_Source_Ventilator/tree/master/ControllerSourceCode

Fantastic progress, I spent the last two hours trying to make sense of FDA standards, I’ll hunt down your code early tomorrow morning and load it and give it a shot. Thank you so much for working on

After an hour-and-half of workiing on this? I recognize that we have ONE out of about SIX standards that the FDA refers to. We have IEC 60601-1? ?called the "General Standard" by the FDA. They list

New parameter to setup pressure and flow limits: https://youtu.be/FbON0UKIEyQ Have fun, MV

Gordon Probably already answered, but there are different boot loader software. Older Nanos came with what is now called the "old boot loader". Newer Nanos come with a newer boot loader. There are

Thanks Marcelo. Will do! Do you have a link to the repo? [email protected]> wrote:

OK, need to call on all of you experts once again. we are having troubles with one particular batch of Nanos ?not being willing to be uploaded new code. this batch of three did not seem to have a

Another good point. In looking at servos, there are metal gear models for very reasonable prices, as well as high end designs. I'm starting out testing with plastic gear servos, just to get an idea if

Be aware that the gears in most RC model Controllers are plastic and they wear out.....

Yes, that is a good question. The valve is designed to be connected to standard "Y" circuit hoses, a disposable filter could be included. Filters are probably a good idea for any design. The valve is

HOORAY!! ?A copy of the standards that we are allowed to peruse ?temporarily has been found! ?Thanks to everyone who worked on this, we obviously can’t put them out there because they are

You may consider to send him this demo: https://youtu.be/u2GeKEEkZSk Still work in progress... I am focus in other components right now but I want to optimize the LCD library. Stepper motor requires

Bob, do you have any of these standards? ? In the document I forwarded is the list, scan for the word general standard and the list is there.

Fascinating way to build a vAlve!!! What will people think of next?