E-Vent controls
Here's the emergency ventilator project discussed today: https://e-vent.mit.edu/
@slocum, @jiri and @zfredin are embedded electronics gurus who could develop the fab-labable controller you raised if that would be helpful, we could test in the CBA shop, and then e.g. @decostern could test reproducing it in his well-equipped fab lab (in Belgium), before propagating more widely globally.
The controls for the controller will of course need substantial medical input and testing.