Adjustable electrical learner without resting potential

Abstract

An adjustable electrical learner without a resting potential belongs to the teaching instrument technology field. The learner is formed by a test hole, an electronic switch, a test source, an electronic amplification stage, a series voltage dividing unit, a display excitation unit, a display system and a voice unit. A tested object is inserted into the test hole. Under selection of the electronic switch, the test source forms a power supply mode with a frequency and a power supply mode without the frequency. Through quadruple voltage enhancement of the electronic amplification stage, according to a frequency state and a non-frequency state of the object, output of a voltage dividing output point of the series voltage dividing unit is determined so as to excite the corresponding display excitation unit and form optical display of the display system and a sound prompt of the voice unit. In the invention, a basic active component of an electronic relay is taken as an active component of the unit, a plurality of functional logical relationships can be formed, close connection of a resistance component structure and the frequency is understood and then meanings of capacitive reactance and inductive reactance are know so that a beginner has a certain electrical base.

Description

technical field [0001] It belongs to the technical field of teaching instruments. Background technique [0002] Innovation is the soul of a nation, and young students are the power of innovation. [0003] The strength of a country lies in its talents, and the cultivation of talents lies in education. The focus of education on young people is that the country is strong when young people are strong, and the country progresses when young people progress. To cultivate young people's love for science, improving the quality of teaching is the key, and the accuracy of experimental instruments is an important factor in improving teaching. The experiments are more convincing, so that students can understand things, understand natural phenomena, inspire students' thinking, and play an important role in improving the level of education. Therefore, various experimental instruments in teaching are constantly improving, but there are still many deficiencies: First, the types of experime...

AI Technical Summary

Problems solved by technology

Therefore, the various experimental instruments in teaching are constantly improving, but there are still many shortcomings: First, the types of experimental instruments are insufficient, especially the experimental instruments for low-grade students are not comprehensive

Second, the spirit of entertaining and teaching in teaching instruments is not enough. Third, the cost of most teaching instruments is too high. Therefore, for some remote village schools, many common teaching instruments cannot be popularized.

[0005] However, there are difficulties in designing a circuit with a demonstration instrument and at the same time it can become a self-made test circuit for beginners. First, from the demonstration effect, because there are many concepts in electricity, it is a demonstration of that aspect; The design of the instrument is mainly to demonstrate the physical properties of components that are closely related to frequency, such as capacitors and inductances. Only by demonstrating those aspects can their physical properties be fully displayed. Thirdly, the most important point is, Although some circuits can achieve the purpose of demonstration, they cannot be an excellent self-made experimental circuit, because an excellent self-made experimental circuit also involves the subject of each unit experiment, which is suitable for beginners, and at the same time it also involves the interest of beginners, and Whether it is easy to install successfully and so on, so this kind of excellent line must also be enriched, innovated and developed

Images