Electricity demonstrator with differential amplification

Abstract

The invention provides an electricity demonstrator with differential amplification, and belongs to the field of demonstration of teaching apparatuses. The electricity demonstrator is formed by a multi-vibrator unit, a button type electronic switch, a test hole, a differential amplification unit, a series type voltage-dividing unit, a display system, a restart unit, and a voice unit. A tested element is inserted into the test hole, the button type electronic switch selects the multi-vibrating unit to output voltages with and without frequency, the voltages are amplified by the differential amplification unit, the series type voltage-dividing unit is started, three optical displays and sound instructions of the display system and the voice unit are formed, and the restart unit is used for enabling a termination unit of the display system to end a positive feedback, recovering the original state, and preparing for the next demonstration when there is no tested element. According to the electricity demonstrator, triodes are regarded as active elements of the units, logic relations with various functions can be composed, and the thinking of students can be developed.

Description

technical field [0001] The utility model belongs to the field of teaching instrument demonstration. 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...

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

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