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Here is the zip file of the 0.1 version of the hardware. this is a raw, cluttered, unfactored software. Not production grade. Once, we freeze the functions, I will have Jack and Marcello take it over

oops, sorry, i meant 100 cm of water. why am I using email like a chat? Gordon, please send me your number I will call you. I need to discuss this L298N business. Mouser has just over a thousand of

whatsapp works for me. farhan wrote:

But it should be useful to do the crucial DISCONNECT ALARM Gordon wrote:

Ah...I didn't read. 100 mm of water is only 10 cm. That iran't much. but it might allow being a disconnect alarm. We use up to 50 or 60 cm (500 mm) of water pressure to ventilate a patient. Gordon

OK, I don't know exactly how to call that without incurring large long distance costs. is there way to use facetime? Is that pressure ABSOLUTE (hence, it is just a little bit above atmospheric) --

The resolution is about 0.5mm or even less. - f

Gordon, I don't think i have your number. mine is +91-9849026029. The sensor can go to 100mm of H2O above atmospheric pressure. - f wrote:

VERY IMPRESSIVE!!!!!!!!! I wish I had seen that just a bit ago!!! You have made fantastic progress!!!!! I don't understand exactly how your pressure monitor is working. Can you tell me a) the smallest

Gents, Please review the candidate hardware. If you guys are fine with the functionality, I will start laying this out. Gordon, what is a good time to call you?

Hence sensors that measure “gauge” pressure… or the difference to atmospheric. A two port sensor is ideal for this. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

Check the MPX5500 or MPX5100.? Simple analog read.

Good point (you are probably a pilot, right?) The delta between 0 and 10000ft is about 4~5 PSA’s https://www.mide.com/air-pressure-at-altitude-calculator

Hi, Shouldn't the pressure sensor be a differential sensor; sensing the difference in airway pressure against the ambient pressure. It looks like you are trying to accurately measure tenths of a PSI

?airway pressure can vary between -20 cmH2O to 60 or even 80 cmH2O in the event that the over-pressure relief valve fails. Pressure sensor should not be destroyed by being exposed to twice that

Gordon I assume you were typing when my 2:31 post 219 appeared. Is that solution acceptable? Bob

Thanks Doug Looks like this design work come before? finishing PEEP valve. I posted a physical layout with connections here and on GitHub. It would be great to have people review, modify and add to

It doesn't have a barb or nipple suitable for connecting to a thin plastic hose; it was made to measure AMBIENT pressure so it only has an opening into its case. Gordon [email protected]> wrote:

Thank to your post I saw that. I proposed in the P sensor topic making a cover that includes a barb over the orifice. If I have the case and flange dimensions I can whip up something quickly that can

0x3F is an alternate I2C address used by some LCD displays.