Spectrometer Attachment for Smartphones

Unlock the hidden spectrum of your light sources with this fully 3D-printable smartphone spectrometer! Designed for photographers, educators, and curious minds, this compact and modular attachment turns your phone into a powerful spectroscopic tool. Whether you're comparing studio lights, testing LED quality, or exploring the physics of blackbody radiation, this spectrometer reveals what your eyes can’t see. Easy to print, assemble, and align—with adjustable phone mount and optional resolution extension—it’s perfect for classrooms, home labs, or anyone who wants to understand their light beyond color temperature.

Printable parts list (numbers as in photos):

1. …
2. Spectrometer Main Body 
3. Slit Plate (0.5 mm slit) 
4. Extension Module (optional)
5. Phone Mount Base
6. Phone Clamp Screw Assembly
7. Phone Clamp Support Bar
8. Phone Mount Arm

Extra parts:

Nine M 3x10 mm bolts with nuts and external tooth locks

Diffraction grating 5x5 cm (I bought my from Temu for about 3 euros)

Link: https://www.temu.com/goods.html?_bg_fs=1&goods_id=601099873637703&sku_id=17593680938624&_x_sessn_id=8vg6nytmgb&refer_page_name=bgt_order_detail&refer_page_id=10045_1751839794194_6ibszem1a2&refer_page_sn=10045 

Assembly:

Start with print profile Main body and attachment for better resolution

Then continue with print profile Phone mount

Finally print with PETG or ABS models from print profile Parts that require extra strength, 100% infill