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Development of a Low-Cost Spectrophotometer Using Arduino for Educational Utilization
New Phys.: Sae Mulli 2019; 69: 559~567
Published online May 31, 2019;
© 2019 New Physics: Sae Mulli.

Gyeongmo MIN1, Junehee YOO*1, Hyunjoo MOON2

1Department of Physics Education, Seoul National University, Seoul 08826, Korea
2Kwangyang Middle School, Seoul, Seoul 05104, Korea
Correspondence to:
Received January 11, 2019; Revised March 7, 2019; Accepted April 19, 2019.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
The students’ understanding of black-body radiation, which is the beginning topic in high-school physics II, is not sufficient. Also, because spectrophotometers are expensivene using that is difficult as school cannot afford then. In this study, we developed a low-cost spectrophotometer that students can fabricate using Arduino. The low-cost spectrophotometer can measure the light intensity for wavelengths ranging from 350 nm to 980~nm to a resolution of 10 nm, which makes this spectrophotometer suitable for obtaining wavelength-depended light intensities for different light sources. The measurement obtained using this low-cost spectrophotometer can be transformed into light-intensity graphs by using high school mathematics and through Excel, making physical computation and quantum study at school possible. The wavelengths measured using low-cost spectrometers are found to have a 1% error when compared with the wavelengths of well-known lasers. Finally, the graph of wavelengths between 400 nm to 700 nm measured by using the low-cost spectrophotometer was found to be similar to the graph of wavelengths measured by using existing commercial spectrophotometers, with a reliability of 80%.
PACS numbers: 01.50.H-, 07.05.-t, 01.40.Fk, 95.75.Fg
Keywords: Physical computing, Spreadsheets, Spectrophotometer, Wavelength-Light Strength Graph

May 2019, 69 (5)
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