南理工電子電工實驗數(shù)字計時器設(shè)計實驗報告-資料下載頁
2025-02-04 14:42本頁面
【導(dǎo)讀】速校分以及報時功能的要求。3．設(shè)計、安裝、調(diào)試譯碼顯示電路。出頻率為500Hz的低聲；59′59″時發(fā)出頻率為1KHz的高聲）。CD4040是一種常用的12分頻集成電路。中利用其與NE555組合構(gòu)成脈沖發(fā)生電路。其內(nèi)部結(jié)構(gòu)圖如圖4所示。為清零端，Q1~Q12為輸出端，其輸出信號頻率分別為輸入信號頻率的2-1~2-12。值為1kΩ和3kΩ的電阻各1只。
【正文】 A7 4 L S 0 0 DU 1 3 A7 4 L S 7 4 D1D21Q5~1Q6~1CLR11CLK3~1PR4U 1 4 A7 4 L S 2 1 DU 1 5 B7 4 L S 2 1 DU 1 6 B7 4 L S 2 1 DU 1 7L M 5 5 5 C MGND1DIS7OUT3RST4VCC8THR6CON5TRI2U 1 84 5 1 1 B D _ 5 VDA7DB1DC2DD6OA13OD10OE9OF15OC11OB12OG14~EL5~BI4~LT3U 1 94 5 1 1 B D _ 5 VDA7DB1DC2DD6OA13OD10OE9OF15OC11OB12OG14~EL5~BI4~LT3U 2 04 5 1 1 B D _ 5 VDA7DB1DC2DD6OA13OD10OE9OF15OC11OB12OG14~EL5~BI4~LT3U 2 14 5 1 1 B D _ 5 VDA7DB1DC2DD6OA13OD10OE9OF15OC11OB12OG14~EL5~BI4~LT3U 2 2 A4 5 1 8 B D _ 5 V1A31B41C51D6EN12MR17CP11U 2 3 A4 5 1 8 B D _ 5 V1A31B41C51D6EN12MR17CP11U 2 4 A4 5 1 8 B D _ 5 V1A31B41C51D6EN12MR17CP11U 2 5 A4 5 1 8 B D _ 5 V1A31B41C51D6EN12MR17CP11U 2 6ABCDEFGCKC14 7 n F R 2 91 k Ω R 3 03 k Ω 1234567U 2 7ABCDEFGCK111098141312U 2 8ABCDEFGCK18171615212019U 2 9ABCDEFGCK25242322282726U14 0 4 0 B D _ 5 VO1015O17O111O09MR11~CP10O43O52O64O713O812O914O26O35V C C5VV C C5VV C C5VV C C5V0007374V C C5VV C C5VV C C757677U 3 0 A7 4 L S 2 0 D79808182838464626667727029303132333435363738394041424344454647484950515253545556V C C5V0V C C858687088V C C5VV C CJ2K e y = S p a c e0V C C5VV C C899091929394959769716557636168605958U 3 1B U Z Z E R2 0 0 H z 980J1K e y = S p a c e0V C C789600V C CV C C0V C C0V C C0
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