javiermansilla shares: 

Macro ring/tunnel meant for microscope lenses.

The led used is: https://www.aliexpress.com/item/1005003443374613.html, 12V 4000K led ring.

The cover part can be any color, but I prefer it black. The transparent diffuser could work also in white filament, but the transmitted light amount would be smaller.

I tested it without sanding the transparent part, but sanding it would probably give better results.

0.3mm layer, no supports needed.

download the files on: https://www.thingiverse.com/thing:5988960

Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!

Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!

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