madaeon's Automatic ventilation for AMBU bags
thingiverse
UPDATE 1: Added first tested firmware files, and parts for M8 based build. Modified the original parts from madaeon's (GrabCAD) wonderful design to be printer friendly, and easy to assamble using M3/M4 screws and epoxy. The setup includes an EasyDriver, an Arduino, a NEMA17 motor, threaded shaft and some type of threaded rod (M8, helicoidal, helix screws, ...) See https://grabcad.com/library/diy-automatic-ventilation-for-ambu-bags-3d-printable-1 for the original design. Stay at home, wash your hands. Please realize that this has not passed any regulation, use at your own risk.
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