[DIYbio] Iranian Engineers Develop $99 Open Source Ventilator

"Hadi Moradi, an associate professor at the University of Tehran's School of Electrical & Computer Engineering, is working to develop an open source ventilator for patients who have COVID-19. The IEEE senior member and his team have designed a low-cost and easy-to-build ventilator and plan to make its specifications available to manufacturing companies in Iran.   "Due to the current healthcare situation and the fact that the initial design previously had been tested by the MIT team, the ministry allowed us to test our first version during the week of 5 April. It was important to put the device on the right class of equipment so the required standards can be met accordingly.  We hope to finish our initial testing the week of 12 April and start production locally the following week.  We are aiming to make the design open source and will let other IEEE regions know. Since building this machine involves a combination of electrical, mechanical, and bioengineering, it is important to have members from all these field work together to build it." "

"Download me here:

https://github.com/stm32ov/ov​

Our goal is to provide a simple solution to build a low cost yet effective emergency ventilator.

This design is appealing because of the redundancy of the servos, which combined with current monitoring as well as pressure and airflow control provides control similar to what is found in high end ventilators. Peek can be provided by using back-pressure on the output line.

Our main focus is manufacturing the shield and control unit box, while the other parts would be printed or sourced locally. However, if necessary, get in touch with us and we'll be able to provide the whole system fully assembled.

The parts have been chosen carefully in order to make sure that there will be no stock supply issues up to 1000 units.

We are looking for medical engineers, software engineers and medical doctors willing to contribute and make the project useful for their part of the world as well as participating to the code-base and mechanical design.

We are planning on providing the control unit at a price of max 99$ or equivalent + shipping, while the whole kit would be provided for a low price aswell in case you're not willing to 3d print and manufacture all the components with your own resources, while keeping the project fully open source.

And yes of course we realize that the system is missing a mixing chamber for proper O2 concentration control as well as a humidifier. The humidifer and warmer is an external module on some ventilators, and maybe this module can be aquired separately.

Before commenting and saying that it is incomplete please read our current development schedule on github."

"Hardware development

TODO Shield PCB

TODO air mixing chamber to be added and O2 sensors to measure and control input oxygen concentration.

TODO air warmer and humidifier.

TODO a proper back-pressure PEEP valve controllable by other servos on the output.

TODO air filter on the output

TODO battery backup

Software development

TODO plot flow

TODO finalize PRVC mode

TODO detect servo failures and create a certain alarm sound. Adapt strength to compensate

TODO display measured values on the upper side of the LCD display

TODO create an OpenGL display on the computer that can display parameters and plot graphs at high resolutions

Online Resources

https://www.github.com/stm32openv

https://www.twich.tv/stm32openv

https://www.youtube.com/watch?v=p47dtsTrSBI

Support us: bc1qvfh9pt93a0lfqc73k87yw9q587tgxdwmyswrv8

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