Deploying online experiments requires less cost with less maintenance. This paper investigates the design and implementation of online wiring experiments based on the online experimental platform NCSLab (Networked Control System Laboratory). Within the context of the virtual laboratory, the 3D modeling and web-based rendering are explored. Similar to hands-on experiments in physical laboratories, wiring is provided to simulate the wire connection in the real case, and interactions and the design of control algorithms are discussed. The virtual fan speed control system is selected to illustrate the proposed design and implementation method. The result shows that the system can simulate the wiring part of the hands-on experiments with good control performance.