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many thanks - I'll try to get the engineering student to ponder the design and see what they come up with. Erich Schulz, mbbs, mba, fanzca 0410 277 408

I first integrated a pressure sensor based on NXP 7002. Its analog values, once read from ADC,? ranges from 0 to 613 (integer number). Someone provided a formula where those values are translated to

Hi Tom, You are correct, the internals of the Toro valve looks very similar to the Orbit valve. ?Do not need the anti-siphon valve so hopefully that can be removed. ?I do not have one of these

Your Welcome Erich, Yes you can use my photo. Yes & No, the existing 24vac solenoid needs to remain in place to plug the hole but is not used. ?There is a small press fit stainless steel tube in the

Hi, I opened the Toro model 53763 valve up and the construction looks similar to the Orbit "jar-top" valve. Possibility it (or a model without the extra "anti siphon" valve) would be an additional

Thanks MA! is it ok if include your photo from 1102 in my briefing doc? This is essentially just taking a solenoid based valve and replacing the solenoid with a pneumatic line, right? or am I missing

I can't figure out Marcelo's code at the moment and we have a team in Montreal hoping to look at it tonight.? ?Perhaps Marcelo can make it do what we need -- the user interface is very nice, but not

I used zip ties in my design and it actually failed at 468k cycles tiny hole at the head of the zip tie from abrasion during inflation. In their lastest design (link below) they do have CA glue and

Hi, some LatinAmerican approval agency, like the ABNT (Brasilian) put some standards related to medical equipment (ISO/IEC) to the public in a effort to help in this time. Plus Here my googling

Now let me explain how Ashhar made that time measurement work out properly.? ?The following code is at the very beginning of vent_slice() which is called over and over and over....but does nothing

This is pretty simple. But you caught an *ERROR* in the above line of code.? ? The code should MULTIPLY beats_per_minute? times MAX_PHASES, not add them!!!!!? ?I'll correct that!!!!! One

Marcello, One of the side effects of "big loop" code programming is the non-deterministic order of function execution. Timing calculations cannot rely on the number of cycles that the loop or for that

I seemed to recall a brief discussion about using PEX copper crimp rings instead of zip-ties or nylon thread (sorry, can't locate the original post). Did this idea go anywhere, or has the seal on the

Dear Sirs, First a disclaimer: a have zero background about Tidal Volume. I only imagine that it estimates air volume based in a factor of the pressure accumulated in the time domain. If my assumption

Erich, Details of my modified Orbit valve can be found in the post 1102, 1108, 1111 and 1113. Please let me know if you have any questions. Marc Alan WA9ZCO

curious about "MA's orbit expiratory valve" - do you have a link? no problem if you're too busy - you folk are working like demons! Reminder I'm briefing about 200 engineering students in about 10

Wanted to let everyone know where we are. See attached video.? ?I threw together a working airway system this morning. Got quite a scare-- it turns out that automobile solenoid LEAKS if you have its

Mike,? there are standard fittings that are pin indexed in the operating room and respiratory therapy, or otherwise size fitted so that you can't put the wrong gas on the wrong line.? ?But what

Thanks, guys! I suspect that the nano's that Dave is having problems with, turn out to be DIFFERENT from the ones that I put a bootloader on....and they may not even have one. I discovered that one

All good points. I still believe that after some optimization a single nano is capable of driving a stepper motor even without Irq’s. once I have more time I will do some work for this feature.