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Build Your Own Shop Vac Automatic Switch
Using a strip with built in usb charger to provide the power to nodemcu board is a brilliant idea. Really cool. I am ashamed I did not think on this.
Having both 8 and 12mm holes in the same block is a brilliant idea!
Dude, this is still a ring light, just too big to mount on the lens. You do shoot thru the hole in the middle.
Where did you get those tiny fittings and valves? I must make this immediately!
One note: never remove the rotor from the frame. It can demagnetize if pulled out. When you put it back again, it will be weak. Don't ask how I know.