Design of a Fuzzy-Based Light Absorbance Measurement Device for Chemical Education

The design of a fuzzy-based light absorbance measurement device for chemical education is proposed in this paper. It is developed for supporting the chemical education which the device is not enough for every student. The proposed device measures the solution and calculated the light absorbance of the solution by Beer's law. After that, it amplifies the light absorbance close to the commercial spectrophotometer light absorbance by fuzzy theory. This theory replaces the voltage amplification circuit of the previous light absorbance measurement device. The fuzzy theory does not only increase the light absorbance, but also it increases the coefficient of determination between light absorbance and the concentration which shows the efficiency of the measurement. Furthermore, the proposed device uses 2 color light sensors for measuring the solution. Therefore, it can measured the mixed 2 colors solution and calculated light absorbance by 2 dimensions fuzzy set of the fuzzy theory.