Electron flow direction demonstrator

The utility model discloses an electronic flow direction demonstration instrument, comprising a box body 1, a demonstration board 2, a battery 3, a circuit board 4 and a switch K7, wherein, the demonstration board 2 is fixed on the front panel of the box body 1. A row of demonstration light emitting diodes 6 that can be ignited orderly are arranged on the demonstration board 2 and are controlled by circuit; a power supply wiring seat 5 is respectively arranged at the two sides of the demonstration light emitting diodes 6. The utility model with simple structure except stable and reliable working performance can vividly and directly demonstrates the electronic flow direction and the relations between electronic flow direction and power supply polarity, so that the utility model increases the teaching effects and can be widely used for the teaching of electrochemistry. 本实用新型公开了一种电子流向演示仪，由盒体1、演示板2及电池3、电路板4、开关K7构成，演示板2固定在盒体1的前面板上，在演示板2上设有按设定顺序可依次点亮的一排演示发光二极管6，演示发光二极管6由电路控制，在演示发光二极管6排列的两侧设电源接线座5、5′。该电子流向演示仪，使用方便、工作性能稳定可靠，可以形象、直观的演示电子的流向以及电子流向与电源极性的关系，提高教学效果，可广泛用于电化学教学。