A simple keychain with integrated NFC.

The two stl files need to be loaded into Bambostudio as a single object. The first layer was printed with an extrusion width of 0.2 mm.

At layer 15, a pause needs to be added to insert the NFC coin.

The NFC tags I used are https://www.amazon.it/dp/B0BG2L6WV8?psc=1&ref=ppx_yo2ov_dt_b_product_details.

Unfortunately, they are not adhesive, so I had to manually add double-sided tape.

I also attach the customizable file with Fusion360.