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Interesting. It has an unexpected musical aspect. I'm sure you will find some simple solutions to reduce this. Tom, wb6b

It was MARC ALLEN who thought up how to make the expiratory sprinkler valve work!!!? ?He deserves all that credit. This is a fascinating system.? ?Because we are operating a non linear switching

That's great. Your code solution and additionally that the sprinkler valves are turning out to be so versatile. Tom, wb6b

Sprinkler expiratory valve, driven by a solenoid pneumatic control just like before.... Only with some improved code. The button section is being improved right now so we don’t have easy ways to

That is fantastic. Is the sprinkler valve responding to control at that fast rate, or is it being done strictly by a solenoid valve? Tom, wb6b

active peep! done electronically!

These are exactly the devices I was thinking of. Great minds and all that... Steve S

PEEP?

I agree with Erich, I can't think of a situation where I'd need to shut off a vent emergently. In the ICU we keep an ambu bag? in the room at all times. If there's an emergency, I just unhook the

Take a close look and see if you can identify a new feature that now appears to actually be WORKING! The UF team gave me a much better setup than the one that I had cobbled together...... Gordon

Hi, I'm sorry, I have no idea of availability. It didn't seem to be an issue locally, but it is something that should be considered. Grainger carries an industrial version. wrote:

They look very suitable Gordon, just checking that someone has checked stock levels/delivery times for these? Erich Schulz, mbbs, mba, fanzca 0410 277 408

Our respiratory therapists have them routinely if memory serves me correctly Here is an example Of one on the market that I found by googling— I found several

typically with ventilators "emergency start" is more important than emergency stop! In event of failure it will be more important to disconnect the ventilator and connect it to an alternative, such a

Yeah, that's what I was thinking. The only external device I can think of is a high flow nasal canula system which might be able to provide adequate flow for a ventilator and might be readily

Very interesting to know. Sounds like your hackathon students may provide a useful component here. And, additionally, many other useful solutions. Tom, wb6b

and to clarify, the flow regulators reduce the pressure so would only work with a pump/bellows style ventilator that represurises the gas. Erich Schulz, mbbs, mba, fanzca 0410 277 408

To be honest, I haven't seen any high pressure O2/Air blenders that are not incorporated into ventilators. The standard method of blending is to use flow regulators I'm waiting for the UQ hackathon

The primary project on this group is using a compressed O2/air mixer device that is apparently part of the normal things around a hospital. Here is a post that suggest the possibility of using a fuel