为填充初中物理义务教材门电路实验的空白,我们设计制作了门电路演示仪.利用声、光显示,灵敏度高,可见度大,制作简单、操作方便、使用安全,效果满好.一、电路原理图(如图1)二、元件选择IC 选用 CD4011四二输入端与非门集成电路一块,3DG12,3CG23三极管各一只;K_1为双刀三掷拨动开关一个;显示元件用小灯泡, In order to fill the gap of the junior middle school’s physical duty textbook door experiment, we designed and manufactured a door circuit demonstrator. The use of sound and light display, high sensitivity, visibility, simple production, easy operation, safe use, the effect is full. First, the circuit principle Figure (Figure 1) Second, the component selection IC selects CD4011 four two input and non-gate integrated circuit, 3DG12, 3CG23 triode each; K_1 is a double-pole three-throw toggle switch; display element with a small light bulb,