Operational amplifier controlled animation display conductivity test instrument

A testing instrument and conductivity technology, applied in the field of teaching instrument demonstration, can solve the problems of insufficient types of experimental instruments, insufficient types of test instruments, and high cost of teaching instruments

Inactive Publication Date: 2019-09-24
谢懿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 ...

Method used

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  • Operational amplifier controlled animation display conductivity test instrument
  • Operational amplifier controlled animation display conductivity test instrument
  • Operational amplifier controlled animation display conductivity test instrument

Examples

Experimental program
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Embodiment Construction

[0166] 1. Select components: select the active components according to the figure, compare the amplifier stage and each unit integrated circuit of the oscillation unit to select the operation integration 324, select the binary counter 4060 for the first and second unit integrated circuits of the driving unit, and select the decimal system for the third unit integrated circuit The counter is 4017, the triode is PNP tube 8550, the sensitive adjustable resistor in the first-stage amplifier unit and the oscillation resistor in the oscillation unit are adjustable resistors, and the oscillation capacitor is selected with a small leakage. There are no special requirements for other Zener tubes, diodes, and resistors and capacitors. The voice film in the audio unit should record the content and pronunciation content in advance. For example, the voice film paired with the third unit should be recorded in advance. kind of music. If the voice film paired with the second unit should be pr...

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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...

Claims

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Application Information

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IPC IPC(8): G09B23/18H03F3/42
CPCG09B23/181G09B23/187H03F3/42
Inventor 谢懿
Owner 谢懿
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