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In my previous note, I think I found the cheapest/ best differential sensor. There isn’t really a problem with analog output except. They are strain gauge concept (piezo electric) but of course only

I just discovered this project last night and I'm stoked. I just want to say thank you to everyone here working tirelessly on this. I think it will really make a difference and save a lot of lives.

Thanks Chip For caring to share Have a safe health 73 Kumar VU2BGS

The CSSALT team at the University of Florida has (after a bit of urging) updated their Specifications for the performance of the Ventilator.? You can read them here:

Hi folks, new to the group. Been trying to educate myself on ventilator operation and ran across these two resources. -- Chip - K9MIT Kokomo, Indiana

I press fit boards into slots in printed paddle keys that I have made. I open a vice and put a block of wood on the PC board and crank it home. Press till flat. I tried openscad and found that it

I ordered a few Of the board mounted sensors from Amazon.

I ordered three of these boards due here March 30th. https://www.amazon.com/KeeYees-Temperature-Humidity-Atmospheric-Barometric/dp/B07KYJNFMD/ref=sr_1_2?keywords=bmp280&qid=1585393264&sr=8-2 I'll try

Excellent. I am gearing up to try to soldher to the microchip. It is smaller than any SMD I have ever worked with.....

I just ordered three of these that should come in March 30th. https://www.amazon.com/KeeYees-Temperature-Humidity-Atmospheric-Barometric/dp/B07KYJNFMD/ref=sr_1_2?keywords=bmp280&qid=1585393264&sr=8-2

Great idea Raf. I have been trying to use a GitHub branch I started called Realization but I haven't seen anyone else post there. I can immediately contribute several docs. Make it and they will come.

David Thanks for clarifying the cleaning. I had asked about it in another thread where I was trying to develop a sensor spec since we are all over the place on this. Previously in this thread (#395) I

I'm standing by at this point as stuff outside of my field of competence is being discussed and pcb is on its way. I was wondering if it could be useful to start creating shared documentation that the

Hi, Doing a search on quantity in stock here are some interesting sensors, that are available in quantity at reasonable price points. One has an exposed back, the others are gauge type. It the body of

Sent: Friday, March 27, 2020 10:34 PM To: [email protected] Subject: Re: [VentilatorDevelopers] schematic in KiCad and pdf Some progress, some learning curve on the new rev of KiCad...

Some progress, some learning curve on the new rev of KiCad...? Not seeing attached files in this view as I compose, but let's see if the attachments are actually there. B

Hi guys, UF engineer here, but I don't get to post much. I prefer running a tube from circuit board to vent. ?Its not mentioned in the spec but I personally prefer it:?the tube approach facilitates

Maybe Jack's suggestion that someone from the university contact the sensor manufactures is the best hope for getting large quantities of the proper sensors. There is bound to be a solution with the

Your raise a very interesting idea. Well we had planned to put the whole sensor into the airway, if we put it in a small sealed box we could actually run a tube from that!

Yes a hot-wire anemometer is typically what cars use for the mass sensor… and you know what that thing costs for your car. Thermocouples (metal composite) have too much thermal mass to respond