Filter with Fan for Foldable Respirator ( hot period version )

thingiverse

I hope with this new filter, to create a respirator easier to dress in the heat. Here in Italy the temperature is hot, the hot humidity makes breathing difficult. This project has not yet been tested. In the project file (* .123dx) the case is not joined to the screw part (that of the original project, therefore is compatible), while in the stl file it is joined. I reduced the space needed for the filter from 5mm to 4mm. 8 screws are needed: x4 - 1.5mm diameter, 3mm length x4 - 1.5mm diameter, 13.5mm length (not mandatory) The filter is slightly smaller than the original, you can cut the original filter. the fans I am using are 40mmx40mmx10mm, and are connected as an input from the left filter, and as an output from the right filter. They are powered at 5V x0.4A. I haven't thought about where to put the battery and interruptor yet. Ideas for future tests: - replace a filter with the battery(9v) container (perhaps an arduino micro) - operate the only fan left as both input and output, detecting breathing or increased fatigue of the fan (due to the change in pressure in the mask caused by breathing) Bye, Luca.