Development of a low-cost colorimeter-like for undergraduate classes using microcontroller board and RGB LED

Abstract

Teaching and learning strategies that use innovating technologies, such as the development of software or an understanding of the theoretical concepts of analytical equipment, can be essential tools for the construction of knowledge. In this way, this work describes the construction of an innovative and lowcost colorimeter using a RGB LED and a microcontroller board as a guide for teachers of undergraduate classes to prepare pedagogical activities using the proposed device as a learning object. The device was applied in experiments using methylene blue (MB), methylene orange (MO) and cobalt chloride (CC) aqueous solutions of different concentrations. Each one of these solutions has absorption peaks near the RGB colors. The results demonstrated that this lowcost device was able to identify unambiguous absorption peaks in the expected range of the MB, MO and CC absorption spectrums, allowing us to determine a feasible calibration curve for each tested solution.

A Cloud-Based with Microcontroller Platforms System Designed to Educate Students within Digitalization and the Industry 4.0 Paradigm

“…The results obtained by collecting and analyzing students' answers show that this way of teaching and knowledge transfer is highly rated, which can be seen based on Tables 2 and 3. Results are in accordance with findings in [20][21][22], meaning teaching that took place through solving tasks, that can be encountered in everyday life, by combining modern technologies presents the leading cause for increasing student interest in industrial engineering that increasingly relies on practical knowledge. Mastering new technologies or solving a problem at the root cause leads students to increased motivation, engineering thinking, and an engineering approach to problem-solving [48].…”

“…There is a need to define the new education requirements incorporated into I4.0 and reveal the emerging patterns and similarities in engineering education to cover this need [19]; also, it is imperative to understand and consider new learning platforms to orient learning toward problem-solving learning based on a reallife problem. Providing new approaches in the learning of microcontroller boards, IoT, could-based systems, sensors, additive manufacturing, augmented reality, cybersecurity, and Internet application [20][21][22] allows the preparation of students for new challenges and technologies regarding pillars of the I4.0 approach. Continuous review of the I4 environment is necessary to determine its path and, in consequence, the needs that will emerge in areas such as educational tasks and problems, educational platforms, curricula content, competency requirements, and technologies [14].…”

A low-cost absorbance measurement device using microcontroller

“…Hence, the proposed setup device is a low-cost device as compare to the other device. (4) 3140 JPY A Low Cost LED Based Spectrometer (6) US$ 20 Design of a Hand-Made Light Absorbance Measurement Device for Chemical Education (7) 3700JPY Color Light Sensor Device for Light Absorbance Measurement Device (10) 3000 JPN A Low-Cost Quantitative Absorption Spectrophotometer (12) US$ 25 Development of a low-cost colorimeter-like for undergraduate classes using microcontroller board and RGB LED (14) US$ 27.20…”

“…Hence, it requires a large area as well as it is costly for students. (14) The significant concern is the cost when planning and executing an ease device for the understudies. (15) The electronics field is an interesting concern among innovation designers.…”

RGB-Detector: A Smart, Low-Cost Device for Reading RGB Indexes of Microfluidic Paper-Based Analytical Devices

“…The development of integrated low-cost digital platforms, for example, Arduino [ 7 ], Raspberry PI [ 8 ] or Mbed OS [ 9 ], is increasing for prototyping cheap instruments such as colorimetric detectors [ 3 , 10 , 11 , 12 , 13 ]. Arduino is renowned for the prototype development of colorimetric detectors, thanks to its ease of use, simple programming, and reasonable price [ 3 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ].…”