This
work presents a homemade multirole 3D-printed modular spectrometer
(MPMS), which can be easily assembled like bricks and expanded with
several modules to measure different types of spectra, such as UV–vis
absorption, fluorescence emission, flame emission/absorption, glow
discharge, and even Raman spectra. The spectrometer is designed to
be cheap, flexible, and its inner structure is displayable, making
it suitable for a range of applications and age groups. The assembly
process allows for a clear understanding of the basic structure of
the monochromator, the core component of spectrometers, as well as
reveals the connections and similarities between different spectral
analysis methods. Despite being easily disassembled, the spectrometer
is robust, easy to calibrate, and highly precise, making it suitable
for both qualitative and quantitative analysis. This study provides
a valuable tool for those seeking a practical and educational approach
to spectroscopy.