This work highlights the design and performance analysis of an economical automated spin coater, designed as a substitute for expensive commercial systems employed in thin-film production. The proposed system includes an Arduino-based control unit, a brushless DC motor, and a 3D-printed spin bowl to facilitate accurate rotational control with adjustable spin speed and duration. The efficacy of the designed unit was empirically assessed against a commercial spin coater utilizing similar coating conditions and test specimens. Six sets of glass substrates were coated with dye solutions at varying rotational speeds, and the homogeneity of the deposited films was assessed using ImageJ gray-value measurements. The experimental results indicate that both systems display analogous coating trends, wherein the average gray value diminishes as spin speed increases, attributable to a reduction in film thickness. Minor discrepancies were ascribed to variations in acceleration profiles and motor dynamics. The results indicate that the constructed spin coater provides equivalent coating quality and operational dependability at a much lower cost compared to existing alternatives, rendering it suitable for educational laboratories and controlled-budget research settings. Future enhancements encompass the integration of feedback sensors and sophisticated motor control to achieve superior precision and reproducibility.