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Related Experiment Video

Updated: Sep 25, 2025

Applications for Open Source Microplate-Compatible Illumination Panels
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Open-source colorimeter assembled from laser-cut plates and plug-in circuits.

Kosaku Kurata1

  • 1Department of Mechanical Engineering, Kyushu University, Fukuoka, Japan.

Hardwarex
|May 2, 2022
PubMed
Summary

This study introduces an open-source colorimeter, easily built without soldering, making scientific analysis accessible. It accurately measures substance concentrations, enhancing STEM education and research.

Keywords:
ArduinoColorimeterColorimetric analysisLaser cuttingMortise and tenonPlug-in circuit

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Area of Science:

  • Analytical Chemistry
  • Educational Technology

Background:

  • Colorimetric analysis quantifies solution concentrations, vital in STEM education.
  • Existing DIY colorimeters have limitations in portability and reproducibility, while professional models require soldering.

Purpose of the Study:

  • To develop an open-source, solderless, and affordable colorimeter.
  • To improve accessibility and ease of use for educational and research purposes.

Main Methods:

  • Designed an open-source colorimeter using plug-in electronic modules and connectors.
  • Utilized a laser-cut enclosure for simple assembly.
  • Fabricated the device without requiring any soldering.

Main Results:

  • The colorimeter demonstrated accurate absorbance measurements up to 1.8 (practical use) and 1 (reliable use).
  • Achieved a resolution of 0.01 for measurements.
  • Verified accuracy using potassium permanganate solutions.

Conclusions:

  • The proposed open-source colorimeter is easily and cheaply fabricated, suitable for educational settings.
  • The solderless design enhances accessibility for beginners in scientific instrumentation.
  • The device offers reliable performance for quantitative analysis.