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高中物理教材中的“传感器的简单应用”的学生实验中 ,有一实验项目为计数器原理 .我们制作了一个简易而又精确的计数器 ,可供学生课外制作参考 .整个装置结构如图 1所示 .图 11 工作原理继电器J内部衔铁与触点接出端分别接在计算器“ =”按键两端 .首先在计算器上依次按“ -1
In the student’s experiment of “simple application of the sensor” in the high school physics textbook, there is an experiment project that is a counter principle. We have produced a simple and accurate counter for students to make reference outside the classroom. The entire device structure is shown in Figure 1. Fig. 11 Operating principle The internal armature of the relay J and the contact terminals are respectively connected to the ends of the “=” key of the calculator. First press “-1” on the calculator.