Two-input NOT gate type frequency observer

Abstract

The invention relates to a two-input NOT gate type frequency observer and belongs to the teaching instrument demonstration field. The two-input NOT gate type frequency observer is composed of a display system, a voice level, a test hole, a two-input door gate electronic switch unit, an adjustable amplification unit, a demonstration power source circuit unit and a multi-point voltage division circuit unit. The adjustable amplification unit is composed of a quadruple voltage boosting circuit, a change-over switch circuit and an emitter follower and can perform double voltage boosting and quadruple voltage boosting through the change-over switch circuit according to needs; the two-input door gate electronic switch unit controls the direct current and alternating current situations of the demonstration power source circuit unit; when different objects are connected into the test hole, after passing through the tested objects, the output of the demonstration power source circuit unit will be decreased under alternating current and direct current, and at this moment, the multi-point voltage division circuit unit can be excited through the voltage boosting of the adjustable amplification unit, so that the voice level and the display system can be excited to form sound and light demonstration; and thus, a majority of young people' love for science can be cultivated.

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 dem

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