为了解决课堂演示实验难以观察电路连线的问题,设计了一款能实时展示实验操作过程、增加可视化的电学实验演示仪.教师通过操作实验装置后面的继电器来控制LED灯的亮灭,直观展示电路的连线过程.此演示仪操作简单,具备可视化、可实现多个实验的优点. In order to solve the problem that it is difficult to observe the circuit connection in the classroom demonstration experiment, a real-time demonstration experiment was designed to increase the visualization of the electrical experiment demonstrator. The teacher controlled the LED light on and off by operating the relay behind the experimental device Circuit connection process.This demo is easy to operate, with visualization, can achieve the advantages of multiple experiments.