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摘要本次实习所设计的八路抢答器除具备基本的抢答功能外,还具有报警功能。电路可同时进行八路优先抢答,按下按键后,电路有蜂鸣声,同时显示优先抢答者的号码数。抢答成功后,再按下...
摘要
本次实习所设计的八路抢答器除具备基本的抢答功能外,还具有报警功能。电路可同时进行八路优先抢答,按下按键后,电路有蜂鸣声,同时显示优先抢答者的号码数。抢答成功后,再按下按键,显示不会更改,除非按下复位键。复位后,显示清零,可以继续抢答。整个电路包括抢答,编码,优先,锁存,数量及复位电路,SB1到SB8为抢答键。SB9为复位键,CD4511是一块含BCD-7集锁存,译码,驱动电路为一体的集成电路,它采用74ls148来实现抢答器的选号。74l279芯片实现对号码的锁存,采用74ls192实现十进制的计数,采用555芯片产生脉冲信号实现报警信号的输出。
此次实习通过课程设计提高和巩固所学的基础知识,以及知识的综合应用和焊接技术
关键词:抢答器,编码,译码,报警。 展开
本次实习所设计的八路抢答器除具备基本的抢答功能外,还具有报警功能。电路可同时进行八路优先抢答,按下按键后,电路有蜂鸣声,同时显示优先抢答者的号码数。抢答成功后,再按下按键,显示不会更改,除非按下复位键。复位后,显示清零,可以继续抢答。整个电路包括抢答,编码,优先,锁存,数量及复位电路,SB1到SB8为抢答键。SB9为复位键,CD4511是一块含BCD-7集锁存,译码,驱动电路为一体的集成电路,它采用74ls148来实现抢答器的选号。74l279芯片实现对号码的锁存,采用74ls192实现十进制的计数,采用555芯片产生脉冲信号实现报警信号的输出。
此次实习通过课程设计提高和巩固所学的基础知识,以及知识的综合应用和焊接技术
关键词:抢答器,编码,译码,报警。 展开
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In this paper,
This internship the designed eight-way responder in addition to the basic vies to answer first function, but also has alarm function.Circuit can be simultaneously eight-way first vies to answer first, press the button, after circuit with hum, at the same time show first vies to answer first the number number.After the success of the vies to answer first, and then press the button, the display will not change, unless by pressing the reset button.After reset, display, can continue to vies to answer first.The entire circuit including vies to answer first, coding, priority, latches, quantity and reset circuit, SB1 to SB8 vies to answer first key.SB9 to reset, CD4511 is a BCD - 7 sets latches, decoding, drive circuit for the integration of integrated circuit, it adopts 74 ls148 to achieve responder pick.74 l279 chip to realize the number of the latch, the decimal system is realized by using 74 ls192 counter, alarm signal is realized by using 555 chip to produce the pulse signal output.
The practice through courses designed to improve and consolidate what they have learned basic knowledge, and comprehensive application of knowledge and welding technology
Keywords: buzzer, encoding, decoding, call the police.
This internship the designed eight-way responder in addition to the basic vies to answer first function, but also has alarm function.Circuit can be simultaneously eight-way first vies to answer first, press the button, after circuit with hum, at the same time show first vies to answer first the number number.After the success of the vies to answer first, and then press the button, the display will not change, unless by pressing the reset button.After reset, display, can continue to vies to answer first.The entire circuit including vies to answer first, coding, priority, latches, quantity and reset circuit, SB1 to SB8 vies to answer first key.SB9 to reset, CD4511 is a BCD - 7 sets latches, decoding, drive circuit for the integration of integrated circuit, it adopts 74 ls148 to achieve responder pick.74 l279 chip to realize the number of the latch, the decimal system is realized by using 74 ls192 counter, alarm signal is realized by using 555 chip to produce the pulse signal output.
The practice through courses designed to improve and consolidate what they have learned basic knowledge, and comprehensive application of knowledge and welding technology
Keywords: buzzer, encoding, decoding, call the police.
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