Operational amplifier controlled animation display conductivity test instrument

Abstract

The invention relates to an operational amplifier controlled animation display conductivity test instrument, belonging to the demonstration field of teaching instruments. The animation display conductivity test instrument is composed of a test rod, a test clamp, tester jacks, a first-stage amplification unit, a second-stage operational amplification unit, an oscillation unit, a sound unit, a pushing unit, a zeroing unit, a light color display unit, an image effect unit and a quick-break protection adjustable power supply. A power supply for starting quick-break protection during overvoltage is arranged to protect stability of test instrument. When a tested electronic element is inserted into the tester jacks, according to the characteristics of object conductivity, the tested electronic element is amplified by the first-stage amplification unit and then enters an in-phase input end of a comparison amplifier in the second-stage operational amplifier unit, output is generated on the basis of the intensity of input signals, the sound unit is started to emit sound and also the pushing unit is excited to act, the light color display unit generates light display, animation images are formed, and then visual animation display and a voice effect are achieved. The operational amplifier controlled animation display conductivity test instrument is quite interesting, and can arouse the interest of teenagers to increase the love for science.

Description

technical field [0001] The utility model belongs to the field of teaching instrument demonstration. Background technique [0002] Technology is the primary productive force for national development. Technology requires innovation to have development potential, and innovative technology requires a large number of scientific and technological talents. 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. Accurate experimental instruments, so The experiments done 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. [0003] All kinds of experimental instruments in teaching are constantly improving, but there are still many shortcomings: First, the types of experimental instruments are insufficient, especially the experimen...

AI Technical Summary

Problems solved by technology

[0003] All kinds of 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

The second is that the spirit of entertaining and teaching in teaching instruments is not enough, the third is that the power supply is not strong enough, and the fourth is that the types of some of the most basic testers are not enough, such as the tester for the understanding of electronic components for junior students Wait

Fifth, the cost of most teaching instruments is too high now, so for some remote village schools, many common teaching instruments cannot be popularized

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