基于射頻無(wú)線通信的點(diǎn)陣顯示屏設(shè)計(jì)與實(shí)現(xiàn)_畢業(yè)設(shè)計(jì)-資料下載頁(yè)
2025-08-22 17:31本頁(yè)面
【導(dǎo)讀】LED點(diǎn)陣顯示屏優(yōu)點(diǎn)很多，廣泛應(yīng)用于各種場(chǎng)合。目前，采用有線方式傳輸顯示信。息的點(diǎn)陣屏幕安裝和更改位置不便，而采用公共無(wú)線收費(fèi)網(wǎng)絡(luò)傳輸方式運(yùn)行費(fèi)用較高。針對(duì)以上不足之處，本研究的主要目標(biāo)是實(shí)現(xiàn)點(diǎn)陣顯示屏的無(wú)線控制。輸入顯示的內(nèi)容，通過(guò)無(wú)線收發(fā)模式，在下位機(jī)點(diǎn)陣屏顯示接收到的內(nèi)容。從功能上劃分，本系統(tǒng)分為上位機(jī)PC端界面、無(wú)線發(fā)射模塊、無(wú)線接。選擇、波特率選擇和數(shù)據(jù)一鍵發(fā)送，實(shí)現(xiàn)了簡(jiǎn)單的人機(jī)交互。芯片的電路，顯示信息的數(shù)據(jù)存儲(chǔ)在外擴(kuò)32K的隨機(jī)存儲(chǔ)器62256中。CC1100模塊，它具有低功耗、傳輸距離遠(yuǎn)、抗干擾能力強(qiáng)和誤碼率低等優(yōu)點(diǎn)。示屏顯示部分由16個(gè)8×8發(fā)光二極管組成，能夠清晰的顯示4個(gè)16×16分辨率的漢字。
【正文】 得較高亮度，又要兼顧其工作壽命。本設(shè)計(jì)中，每只 LED 工作電流取 20mA。 如此可知，當(dāng)一行全點(diǎn)亮的時(shí)候 總電流： IT=IC=64= 管耗 : Pc=ICV CEsat(管飽和壓降 )== 直流電流放大系數(shù)： （ ） 唐 山 學(xué) 院 畢 業(yè) 設(shè) 計(jì) 18?????? A VVI VVR B BEcc對(duì)于基極偏流電阻，則起到對(duì)基極 20mA 偏置電流限流作用。 基極 限流電阻： （ ） 本方案采用 200Ω 限流電流。集電極電阻采用 150Ω。 點(diǎn)陣顯示屏原理圖設(shè)計(jì) 本設(shè)計(jì)通過(guò) 74HC595 級(jí)聯(lián)對(duì)列進(jìn)行選通，通過(guò) 74HC154 四線 — 十六線譯碼器進(jìn)行行選通。中間用 Tip127 封裝的大功率三極管進(jìn)行電流放大。設(shè)計(jì)好的點(diǎn)陣顯示屏原理圖如下圖 314 所示 。 圖 314 點(diǎn)陣顯示屏原理圖 R113R210R315R49R54R616R76R81a8b7c3d14e2f12g11dp5U1LG7088BHR113R210R315R49R54R616R76R81a8b7c3d14e2f12g11dp5U2LG7088BHR113R210R315R49R54R616R76R81a8b7c3d14e2f12g11dp5U3LG7088BHR113R210R315R49R54R616R76R81a8b7c3d14e2f12g11dp5U4LG7088BHR113R210R315R49R54R616R76R81a8b7c3d14e2f12g11dp5U5LG7088BHR113R210R315R49R54R616R76R81a8b7c3d14e2f12g11dp5U6LG7088BHR113R210R315R49R54R616R76R81a8b7c3d14e2f12g11dp5U7LG7088BHR113R210R315R49R54R616R76R81a8b7c3d14e2f12g11dp5U8LG7088BHR113R210R315R49R54R616R76R81a8b7c3d14e2f12g11dp5U9LG7088BHR113R210R315R49R54R616R76R81a8b7c3d14e2f12g11dp5U10LG7088BHR113R210R315R49R54R616R76R81a8b7c3d14e2f12g11dp5U11LG7088BHR113R210R315R49R54R616R76R81a8b7c3d14e2f12g11dp5U12LG7088BHR113R210R315R49R54R616R76R81a8b7c3d14e2f12g11dp5U13LG7088BHR113R210R315R49R54R616R76R81a8b7c3d14e2f12g11dp5U14LG7088BHR113R210R315R49R54R616R76R81a8b7c3d14e2f12g11dp5U15LG7088BHR113R210R315R49R54R616R76R81a8b7c3d14e2f12g11dp5U16LG7088BHR1R2R3R4R5R6R7R8R9R10R11R12R13R14R15R16L1L2L3L4L5L6L7L8L9L10L11L12L13L14L15L16L17L18L19L20L21L22L23L24L25L26L27L28L29L30L31L32L33L34L35L36L37L38L39L40L41L42L43L44L45L46L47L48L49L50L51L52L53L54L55L56L57L58L59L60L61L62L63L64L1L2L3L4L5L6L7L8L9L10L11L12L13L14L15L16L17L18L19L20L21L22L23L24L25L26L27L28L29L30L31L32L33L34L35L36L37L38L39L40L41L42L43L44L45L46L47L48L49L50L51L52L53L54L55L56L57L58L59L60L61L62L63L64011223344556677889910101111131214131514161517A23B22C21D20G219G118VCC24GND12H174HC154200R1200R2200R3200R4200R5200R6200R7200R8200R9200R10200R11200R12200R13200R14200R15200R16H1H2H3H4H5H6H7H8H9H10H11H12H13H14H15H16312Q1312Q2312Q3312Q4312Q5312Q6312Q7312Q8312Q9312Q10312Q11312Q12312Q13312Q14312Q15312Q16VCC VCCVCC VCCVCCVCCVCCVCCVCCVCCVCCVCCVCCVCCVCCVCCH1H2H3H4H5H6H7H8H9H10H11H12H13H14H15H16R1R2R3R4R5R6R7R8R9R10R11R12R13R14R15R16VCCQ015Q11Q22Q33Q44Q55Q66Q77GND8VCC16OE13SQH9SCK11SI14SCLR10RCK12J174HC595Q015Q11Q22Q33Q44Q55Q66Q77GND8VCC16OE13SQH9SCK11SI14SCLR10RCK12J274HC595Q015Q11Q22Q33Q44Q55Q66Q77GND8VCC16OE13SQH9SCK11SI14SCLR10RCK12J374HC595Q015Q11Q22Q33Q44Q55Q66Q77GND8VCC16OE13SQH9SCK11SI14SCLR10RCK12J474HC595Q015Q11Q22Q33Q44Q55Q66Q77GND8VCC16OE13SQH9SCK11SI14SCLR10RCK12J574HC595Q015Q11Q22Q33Q44Q55Q66Q77GND8VCC16OE13SQH9SCK11SI14SCLR10RCK12J674HC595Q015Q11Q22Q33Q44Q55Q66Q77GND8VCC16OE13SQH9SCK11SI14SCLR10RCK12J774HC595Q015Q11Q22Q33Q44Q55Q66Q77GND8VCC16OE13SQH9SCK11SI14SCLR10RCK12J874HC595VCCOESTBCLKR1VCC150G1150G2150G3150G4150G5150G6150G7150G8150G9150G10150G11150G12150G13150G14150G15150G16150G17150G18150G19150G20150G21150G22150G23150G24150G25150G26150G27150G28150G29150G30150G31150G32150G33150G34150G35150G36150G37150G38150G39150G40150G41150G42150G43150G44150G45150G46150G47150G48150G49150G50150G51150G52150G53150G54150G55150G56150G57150G58150G59150G60150G61150G62150G63150G64L1 L2 L3 L4 L5 L6 L7 L8L9 L10 L11 L12 L13 L14 L15 L16L17 L18 L19 L20 L21 L22 L23 L24L25 L26 L27 L28 L29 L30 L31 L32L33 L34 L35 L36 L37 L38 L39 L40L41 L42 L43 L44 L45 L46 L47 L48L49 L50 L51 L52 L53 L54 L55 L56L57 L58 L59 L60 L61 L62 L63 L64ABCDD DD DC CC CB BB BA AA ASTB STBSTB STBCLK CLKCLK CLKR1 R1R2 R2OE OEOE OER2112233
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