Ventilators help to save lives when a patient has caught COVID-19, but in some places it is difficult to gain access to one. They are also very expensive. In this workshop, you will learn how to use an Arduino board, a sensor, and motor controller shield, plus materials from a neighborhood shop, to build an automatic ventilator.

https://wiki.hope.net/index.php?title=Build_an_Easy_Ventilator_workshop