數(shù)碼萬(wàn)年歷的畢業(yè)設(shè)計(jì)(存儲(chǔ)版)
【正文】 電路，日月年越界判斷功能， LED 驅(qū)動(dòng)等功能 。隨著人們生活環(huán)境的不斷改善和美化，在許多場(chǎng)合可以看到數(shù)字電子鐘。 設(shè)計(jì)一種多功能 數(shù)字鐘 ， 該數(shù)字鐘具有基本功能和擴(kuò)展功能兩部分。 T2518DD3 chip III 目錄 第 1 章 緒論 ............................................................................................................................... 1 近幾年來(lái)國(guó)內(nèi)外研制狀況 ............................................................................................. 1 課題的研究目的 ........................................................................................................... 1 課題的研究意義 ........................................................................................................... 2 課題所解決的內(nèi)容 ........................................................................................................ 2 系統(tǒng)原理分析及使用方法 ............................................................................................. 3 第 2 章 數(shù)字時(shí)鐘設(shè)計(jì)原理 ......................................................................................................... 4 設(shè)計(jì)要求 ...................................................................................................................... 4 硬件電路設(shè)計(jì) ............................................................................................................... 4 原理圖的繪制與 PCB 的制作 ......................................................................................... 5 原理圖的繪制 .................................................................................................... 5 PCB 的繪制 ........................................................................................................ 5 第 3 章 數(shù)字時(shí)鐘硬件系統(tǒng) ......................................................................................................... 6 元器件明細(xì)表 ............................................................................................................... 6 穩(wěn)壓器 7805 .................................................................................................................. 7 三極管管腳識(shí)別方法 ................................................................................................. 7 LED 數(shù) 碼管的介紹 ........................................................................................................ 8 LED 數(shù)碼管的結(jié)構(gòu) ............................................................................................. 8 LED 產(chǎn)品特點(diǎn) .................................................................................................... 9 LED 數(shù)碼管的技術(shù)參數(shù) .................................................................................... 10 芯片 T2518DD3 ............................................................................................................ 10 第 4 章 安裝與調(diào)試 ................................................................................................................ 12 安裝順序與要求 ......................................................................................................... 12 手工焊接技術(shù)與工藝 .................................................................................................. 13 焊接技術(shù)要求 .................................................................................................. 13 錫焊工藝過(guò)程 .................................................................................................. 14 手工焊接技術(shù)要領(lǐng) ........................................................................................... 15 連接 ........................................................................................................................... 15 通電調(diào)試 ..................
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