CD40192 control circuit for teaching

A CD40192, control circuit technology, applied in the direction of educational appliances, teaching models, instruments, etc., can solve the problems of inconvenient counter circuit learning and design, poor practicability, and cumbersome on-site teaching application

Pending Publication Date: 2018-07-24
SUZHOU INST OF TRADE & COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the teaching of traditional digital circuit courses, the design and application of counters have been used in the teaching of digital circuits for a long time, but the existing design methods of counter circuit teaching ex

Method used

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  • CD40192 control circuit for teaching

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention clearer, various embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0017] Please refer to figure 1 , In the power circuit: input AC15V alternating current, after rectification and filtering, it is regulated by three-terminal voltage regulator lm7812, and the output +12V power supply can refer to the power supply part of pulse width modulation.

[0018] In the clearing circuit: before the counter circuit starts to work, one side must "clear" the inside of the counter. The clearing circuit composed of capacitor C4 and resistor R8 is connected to the "clearing" terminal of pin 14 of CD40192. The voltage across both ends of the capacitor C4 is 0 at the moment of the power supply, and the 14 pin of CD40192 is at a high level. With the charging of the capacitor, under the pull-down effect of the resistor R8, the 14 pin o...

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PUM

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Abstract

The invention discloses a CD40192 control circuit for teaching. The control circuit comprises an addition and subtraction preset number circuit, a zero clear circuit, a decoding display circuit, a power supply circuit and a start/stop circuit, wherein the power supply circuit is used for providing power for the addition and subtraction preset number circuit, the decoding display circuit and the start/stop circuit; the addition and subtraction preset number circuit is used for controlling the decoding display circuit to output numbers in a one-by-one addition or one-by-one subtraction manner; when the number is added to 9 or subtracted to 0, a number before start is preset automatically by the decoding display circuit; the start/stop circuit is used for controlling output pause or continuity of the decoding display circuit; the zeroing circuit is used for controlling the addition and subtraction preset number circuit to carry out zero clear on output of the decoding display circuit. Byadopting the control circuit, automatic addition and subtraction display of unit digits can be simply and conveniently achieved, the practicability is good, teaching contents can be enriched, and theteaching quality can be improved.

Description

technical field [0001] The invention belongs to the technical field of digital circuits, in particular to a CD40192 control circuit for teaching. Background technique [0002] In the teaching of traditional digital circuit courses, the design and application of counters have been used in the teaching of digital circuits for a long time, but the existing design methods of counter circuit teaching experiments are outdated and single, and the on-site teaching application is more cumbersome and less practical , It is not convenient for students to learn and design counter circuits, and hinders the improvement of teaching quality. Contents of the invention [0003] Aiming at the above-mentioned problems in the prior art, the present invention proposes a CD40192 control circuit for teaching, which simply and conveniently realizes the automatic addition and subtraction display of one-digit numbers, has good practicability, enriches teaching content, and improves teaching quality....

Claims

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Application Information

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IPC IPC(8): G09B23/18
CPCG09B23/186
Inventor 汤伟芳戴锐青王娟顾霞芳
Owner SUZHOU INST OF TRADE & COMMERCE
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