What do we currently need?

Our project depends on your solidarity

This project from the beginning was based on solidarity, we have the support of friends, companies, neighbors, family members, co-workers. We have reached a point where it is necessary to expand the initial idea, to accelerate the development and scale of the project. We must do it this way in view of the PANDEMIC situation of society.

Our team has members on 5 continents and in more than 20 countries. We are already giving our most precious resource, which is our time and our knowledge, but time and knowledge only bring wisdom, not solutions, and we currently need a medical solution in respirators / ventilators.

We need to carry out medical / clinical tests, so we intend to purchase buy (you can also donate these materials if you have them) - If you have medical facilities willing to help please contact us on the GreenLink Bello

  • Lung Simulator

  • Oxygen Sensors (for clinical validation of the O² mixture)

  • Pressure sensors (for validation, not for the device itself)

  • Flow Sensors (also for validation)

Raw Material and Tools for the MarkII Version

  • Acrylics (6mm and 3mm sheets)

  • Windshield Wiper Motors

  • Microcontrollers (Arduino)

  • CNC Laser Cutting Machine

  • Filament printing material (Petg / PLA)

  • Relays

  • Diods


If you can donate these materials please contact us directly here! DONATE MATERIAL

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This was the first prototype of OpenVentilator

This project never got off the ground. But this was only possible because many donated their work time, effort and mainly material to prove that this model would not move.

The Open Source Respirator or Ventilator Project, as you want to call it, is a project that emerged on March 9, 2020, ten days before the initial initiative to join forces with a team.

Our first intuition was that Pandemic would spread quickly not only in our country of origin but also in the world. The only idea that could be scaled to the pace of the pandemic was an Open Source ventilator project.

On March 19, we contacted Jeremias Almada, who had presented some sketches of an "Ambu Pusher" project in a Facebook group CoronaVirus Rapid Supplies.

Make a donation and help build a democratic ventilator

that will help many in the most isolated parts of the world

Our second attempt

We talked to Jeremias to show that his path was right, but that he would need a prototype and a team. So we set up a group on Whatsapp and started prototyping plans. Together with the first members, we made the SLACK community, the Whatsapp group and the work guidelines.

We started to make the second version that already presented the replacement of the Ambu system by a bellows system, we had replaced the stepper motors with DC motors and mainly we started to design the OpenVentilator project as a team. In the first few days, we did not have major costs, but these were the first drawings, essential for us to know what the minimum steps that we needed to meet, project requirements and first debates on scalability should be.

After realizing that this model would require a "H Bridge" to change the polarity of a DC Motor, we decided to change the approach again and make a next prototype. This yes, we had already decided that we would prototype to start having a first contact with the reality that awaited us.

The next version will come to be called the Spartan version. We all dedicated our time to it, but in a few days we started to dedicate our money, something that until then had not happened. As we were all putting our efforts and personal capital into the project, the transparency of our accounts for a greater and better purpose for our entire community was decided in the assembly.

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Our first expenses:

The Spartan Model v.0.0.1

  • 6mm Acrylic Sheets

  • Threaded bars

  • Computer Power Supply

  • Windshield wiper 12V DC motor

  • Petg type filament

  • Linear Guides

  • Cabling

  • Arduino

  • Switch

  • Potentiometer

This first model did get off the ground, we made a very simple prototype that was lovingly named the Spartan model, and the mark II that using Arduino and micro-electronics became our first model.

Despite efforts to make Renders, and especially having thought of everything in control of this first version, it was still insufficient.

After the construction of EsparanV.0.0.1 we noticed mechanical flaws in the construction, problems at the time of assembly and mainly the lack of credibility in such a fragile structure. I leave below the model of our first "respirator"

To see the video access this link


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Make a donation and help build a democratic ventilator

that will help many in the most isolated parts of the world

More Spartan prototypes v.0.0.2

We eliminated the movement of the lever, developed our own diversion valve with 3D printer. We made a system with greater volumetric control and mainly precision. The real Spartan model begins to emerge. Our expenses are already starting to be a big part of the problem to develop the prototypes. It was with this v.0.0.2 that we made the first tests in a simulator.



We started to see the first results, but adjustments are still needed. We make available the first plans for reproduction attempts to happen worldwide in order to streamline prototyping and minimize errors

Although still very homemade, the respirator is placed in a pulmonary simulation device, kindly provided by Samtronic, a company specialized in the validation of respirators and similar equipment.


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We passed the first tests

The device used as a simulator is a Michigan Instruments, which was used together with the prototype to simulate various types of complacency and volumetry. As well as maximum pressure curves. To learn more about the results SEE THE TESTS


The project undergoes changes in terms of security and structure

  • Allocation of the diversion valve within the equipment and away from the patient

  • Improvements in volumetric adjustment tables and scales

  • Equipment assembly documentation improvements

  • Validation of test results with Pulmonologists and Intensivists

  • Increased rigidity and durability of the equipment structure

  • Bellows system improvements

  • Improvments on the Gantry system

The last version so far

Odor CMS - uma imagem grande

So far the best and most reproducible emergency ventilator/respirator

Valves specially allocated for easy maintenance. Acrylic or stainless steel structure. Reliable and robust. A truly warrior and spartan system

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