Giottos air blower filter adapter
Description
This adds an air filter holder to the bottom of the Giottos Rocket large air blaster AA1900 to make the air dust-free for camera sensor cleaning. The blaster can stand up on the filter holder as well as it could on its fins, and the largish filter size provides enough surface area that the blaster refills nicely with air. If you want to use it wth a different blaster model, adjust the top diameter parameter to fit the bottom of the blaster. It's a press-fit. I include versions with looser and tighter tolerances depending on your printer, and you can also resize it if necessary. I printed in ABS, ensuring that my slicing settings made the inside smooth. I then blew out the inside with a powered air blower and ran it through the dishwasher to reduce plastic dust. I am hopeful that this will do the job, but no guarantees. The filter I used was a circle cut from a small-size 3M N95 respirator that turned out not to be useful for anybody in the family. While in theory you could also cut a circle from a surgical mask, I do not recommend doing this as surgical masks [contribute microplastic particles](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7773316/), so a surgical mask filter could be counterproductive. The OpenSCAD code uses and bundles my [Bezier library](https://www.thingiverse.com/thing:2207518).
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