Raspberry Pi LED Screen: Npaj Koj Tsim los ntawm Scratch
Lub Raspberry Pi LED screen project yog ib qho ntawm cov neeg tsim khoom txaus siab tshaj plaws tsim - tab sis cov teeb meem tshwm sim feem ntau tshwm sim ua ntej ib kab ntawm cov cai tau sau, hauv kev xaiv kho vajtse thiab theem kev npaj hluav taws xob. Phau ntawv qhia no mus txog lub ntsiab lus coj ntawm lub vijtsam raspberry pi los ntawm kev npaj- thawj qhov kev xav, suav nrog cov kev txiav txim siab uas txiav txim siab seb koj lub tsev ua haujlwm puas ntseeg tau los ntawm qhov pib.
Qhia meej qhov koj tab tom ua tiag tiag
Ua ntej muab cov khoom sib xyaw rau raspberry pi coj zaub tsim, qhia meej txog qhov twg ntawm ob txoj hauv kev uas koj tab tom ua:
Txoj Kev A - HUB75 matrix vaj huam sib luag project:Koj xav tswj ncaj qha rau LED matrix - tsav ib tus pixels ntawm qib zaub, siv Pi ua lub teeb liab tswj. Txoj kev no yuav tsum tau HUB75-hom LED vaj huam sib luag, RGB matrix HAT, thiab tswj software xws li rpi-rgb-led-matrix tsev qiv ntawv. Qhov no yog qhov "maker" LED zaub project.
Txoj Kev B - HDMI tso saib qhov project:Koj xav siv Pi ua lub khoos phis tawj txuas nrog tus qauv saib lossis TV rau digital signage, media playback, lossis kev suav dav dav. Txoj kev no yog ncaj nraim - HDMI tso zis yog tsim rau hauv Raspberry Pi thiab ua haujlwm nrog txhua yam khoom siv tau.
Cov neeg feem coob nug txog lub teeb pom kev zoo rau raspberry pi txhais tau tias Txoj Kev A. Cov lus qhia no tsom mus rau txoj kev ntawd, uas muaj cov khoom siv tshwj xeeb thiab kev xav txog kev npaj.
Xaiv Koj LED Matrix Panels
HUB75 LED matrix panels muaj nyob rau hauv ntau hom qauv. Ob qhov tseem ceeb tshaj plaws thaum xaiv panels yog:
Lub cev hom (kab × kab):Cov kev xaiv muaj xws li 32 × 16, 64 × 32, thiab 64 × 64 pixels. Cov ntawv loj dua muab ntau qhov chaw tso saib ib lub vaj huam sib luag thiab kev sib txuas tsawg dua rau qhov muab tag nrho cov duab loj, tab sis xav tau tus qauv Pi nrog cov peev txheej tsim nyog los tsav lawv ntawm tus nqi tshiab.
Scan tus nqi:Qhov no piav qhia txog yuav ua li cas lub vaj huam sib luag kab yog hluav taws xob xa mus rau - cov txiaj ntsig zoo yog 1/8 scan, 1/16 scan, thiab 1/32 scan. Tus nqi scan yog tus yam ntxwv kho vajtse ntawm lub vaj huam sib luag tshwj xeeb thiab yuav tsum tau muab sib xyaw kom raug hauv rpi-rgb- coj- matrix lub tsev qiv ntawv teeb tsa. Kev siv tus lej scan tsis raug ua rau pom qhov yuam kev xws li pom cov kab kab rov tav lossis cov ntsiab lus scrambled.
| Vaj Huam Sib Luag Hom | Tag nrho Pixels | Cov Nqi Scan | Hom kev siv |
|---|---|---|---|
| 32×16 | 512 | 1/4, 1/8 | Qhov taw qhia me me, moos qhia |
| 64×32 | 2,048 | 1/8, 1/16 | Cov ntaub ntawv qhia, me me cov qhab nia |
| 64×64 | 4,096 | 1/16, 1/32 | Cov duab loj dua, pixel kos duab |
RGB Matrix HAT: Vim Li Cas Nws Tseem Ceeb
Kev sib txuas ncaj qha ntawm Raspberry Pi GPIO pins thiab HUB75 panels yam tsis muaj lub teeb liab txaus buffering yog lub hauv paus ntawm kev coj cwj pwm tsis zoo - tshwj xeeb tshaj yog thaum tsav tsheb ntau lub vaj huam sib luag ib txhij ntawm cov nqi siab. Ib qho RGB matrix HAT muab kev hloov pauv thiab buffering uas ua kom cov teeb liab kev ncaj ncees xav tau rau kev ua haujlwm zoo ib yam.
Ntau qhov kev xaiv HAT muaj los ntawm cov chaw muag khoom sib txawv, thiab rpi-rgb- coj- cov tsev qiv ntawv matrix txhawb nqa ntau lub HAT teeb tsa los ntawm nws cov software teeb tsa. Xaiv lub HAT thiab teeb tsa lub tsev qiv ntawv kho vajtse teeb tsa kom phim yog cov kauj ruam ua ke - tshawb xyuas lub tsev qiv ntawv cov ntaub ntawv uas cov khoom siv kho vajtse sib haum rau HATs ua ntej kev yuav khoom.
Kev Npaj Lub Hwj Chim: Qhov Kev Pom Zoo Tshaj Plaws
Kev npaj fais fab mov yog qhov twg ntau lub vijtsam coj rau raspberry pi tsim ntsib lawv thawj qhov teeb meem. Cov ntsiab cai tseem ceeb yog:
Panels thiab Pi siv cov khoom siv hluav taws xob sib cais.Pi's GPIO pins tsis tuaj yeem muab lub zog vaj huam sib luag yam tsis muaj kev pheej hmoo rau kev puas tsuaj rau khoom siv. Cov vaj huam sib luag xav tau lub siab 5V cov khoom siv txuas ncaj qha rau lub vaj huam sib luag lub hwj chim input terminals.
Loj lub vaj huam sib luag muab rau qhov siab tshaj plaws tam sim no kos.Tag nrho - kev ua haujlwm ci ntsa iab rub tawm tam sim no ntau dua li nruab nrab - kev ua haujlwm ci ntsa iab. Ib txoj hauv kev zoo tshaj plaws yog kwv yees qhov siab tshaj plaws kos rau tag nrho cov vaj huam sib luag hauv kev teeb tsa, tom qab ntawd xaiv cov khoom siv nrog lub ntsiab lus tseem ceeb saum toj ntawm daim duab.
Siv cov kab hluav taws xob tsim nyog.Vaj huam sib luag hluav taws xob thaiv yuav tsum muaj qhov loj me rau qhov tam sim no nws nqa. Cov hlau tsis zoo ua rau cov hluav taws xob tsis zoo uas cuam tshuam rau qhov ci thiab tuaj yeem ua rau overheating.
Xav txog kev khiav cov vaj huam sib luag ntawm qhov qis qis.Cov tsev qiv ntawv tswj feem ntau tso cai rau qhov ci tuaj yeem txwv hauv software. Cov vaj huam sib luag khiav ntawm qhov qis qis (hais tias, 50–70% ntawm qhov siab tshaj) txo qis zog rub thiab tsim hluav taws xob, uas muaj txiaj ntsig ntev - kev cia siab rau lub sijhawm - tshwj xeeb yog qhov tseem ceeb rau ib txwm - ntawm lossis ntev - khiav kev teeb tsa.
Software Setup Checklist
Rau HUB75-based coj screen raspberry pi tsim, software teeb tsa suav nrog:
Nruab Raspberry Pi OS tam sim no ntawm Pi
Clone lub rpi-rgb- coj- matrix repository
Tsim lub tsev qiv ntawv ua raws li cov ntaub ntawv tsim cov ntaub ntawv khaws cia
Txhim kho qhov kev teeb tsa kho vajtse kom phim koj lub HAT tshwj xeeb
Teem kom raug vaj huam sib luag qhov ntev (kab, kab, saw ntev)
Teem kom raug scan multiplexing rau koj cov vaj huam sib luag tshwj xeeb
Khiav cov khoom siv ntsuas suav nrog txhawm rau txheeb xyuas qhov tseeb kho vajtse teeb tsa
Pib tsim daim ntawv thov code siv Python lossis C++ khi
Feem ntau cov teeb meem yuam kev yog mismatched hardware mapping, tsis raug scan npaum li cas, thiab mismatched vaj huam sib luag qhov ntev. Kev sim nrog lub tsev qiv ntawv tsim ua - hauv cov piv txwv ua ntej sau cov cai tswj hwm kom paub meej tias kev teeb tsa kho vajtse muaj tseeb ua ntej ntxiv qhov nyuaj ntawm daim ntawv thov.
Cov tswv yim tsim nyog npaj rau
Live Sports scoreboard:Integrate cov zaub nrog cov ntaub ntawv kis las API; hloov tshiab cov qhab nia hauv lub sijhawm
Huab cua thiab kev thauj mus los dashboard:Rub cov ntaub ntawv nyob ntawm huab cua thiab thauj APIs; qhia cov ntsiab lus hauv formatted
Retro pixel kos duab ncej:Qhia animated pixel kos duab ntawm kev sib hloov; tswj tau los ntawm lub web interface
Kev tshwm sim countdown moos:Loj -format countdown timer rau cov rooj sib tham lossis cov xwm txheej kis las
Office metrics Board:Qhia txog kev lag luam KPIs lossis pab pawg ntsuas los ntawm cov ntaub ntawv txuas nrog
Cov ntsiab lus
Lub Raspberry Pi LED npo tsim siv HUB75 matrix panels yog qhov zoo nyob rau hauv kev ncav cuag rau cov neeg tsim khoom nrog cov kev paub hauv hluav taws xob yooj yim, tab sis npaj kev xaiv kho vajtse, kev siv hluav taws xob, thiab kev teeb tsa software ua tib zoo ua ntej yuav khoom yuav txhim kho kev tsim kho. Sib piv qhov ntsuas tus nqi ntsuas rau lub cev vaj huam sib luag, siv RGB matrix HAT kom ntseeg tau cov teeb liab zoo, thiab muab cov khoom siv hluav taws xob zoo rau cov vaj huam sib luag yog peb kauj ruam uas feem ntau paub qhov txawv ntawm kev ua tiav los ntawm kev ntxhov siab.
FAQ
Q: Dab tsi yog qhov txawv ntawm ib qho screen coj raspberry pi tsim thiab tsuas yog siv Pi nrog lub monitor?
A: Txuas tus qauv HDMI saib rau Pi yog ncaj nraim - Pi tso tawm cov yeeb yaj kiab dhau HDMI yam tsis muaj khoom siv tshwj xeeb. Lub HUB75 matrix vaj huam sib luag tsim yog txawv: Pi tsav lub LED matrix ncaj qha los ntawm GPIO cov cim siv HAT, yuav tsum tau xaiv cov vaj huam sib luag tshwj xeeb, kho vajtse teeb tsa, thiab teeb tsa software tsev qiv ntawv.
Q: Tus qauv Raspberry Pi twg yog qhov zoo tshaj plaws rau kev coj zaub raspberry pi matrix tej yaam num?
A: Ntau dua - cov qauv qhia tshwj xeeb (Pi 4, Pi 5) muab lub zog ua haujlwm ntau dua, uas tseem ceeb thaum tsav tsheb ntau lub vaj huam sib luag ib txhij lossis ua kom siab - refresh- cov ntsiab lus. Rau ib qho yooj yim - cov phiaj xwm vaj huam sib luag, qis dua - cov qauv qhia tshwj xeeb tuaj yeem ua haujlwm, txawm tias lawv yuav muaj kev txwv kev ua haujlwm ntawm tus nqi tshiab.
Q: Kuv yuav nrhiav tau tus nqi scan rau kuv HUB75 LED matrix panels li cas?
A: Tus nqi scan feem ntau tau teev nyob rau hauv lub vaj huam sib luag cov npe khoom lossis daim ntawv qhia tshwj xeeb. Feem ntau qhov tseem ceeb yog 1/8 thiab 1/16 rau 32 × 16 thiab 64 × 32 panels. Yog tias tsis tau teev tseg, rpi-rgb- coj-matrix repository cov ntaub ntawv muab kev taw qhia txog kev txheeb xyuas tus nqi scan los ntawm lub vaj huam sib luag tus cwj pwm thaum kuaj.
Q: Kuv puas tuaj yeem txuas ntau HUB75 panels rau ib Raspberry Pi?
A: Yog - panels yog daisy- chained, nrog cov ntaub ntawv tso tawm ntawm ib qho txuas mus rau cov tswv yim ntawm cov tom ntej. Lub rpi-rgb- coj- cov tsev qiv ntawv matrix txhawb kev qhia cov lej ntawm cov vaj huam sib luag hauv cov saw hlau. Kev muaj peev xwm ua tau dhau los ua qhov txwv tsis pub siv vim muaj ntau lub vaj huam sib luag tau ntxiv, tshwj xeeb tshaj yog rau tag nrho - cov ntsiab lus video.
Q: Kuv yuav ua li cas yog tias kuv coj cov duab raspberry pi tsim qhia pom qhov yuam kev zoo li kab kab rov tav lossis scrambled pixels?
A: Feem ntau yog vim li cas yog qhov tsis raug scan tus nqi teeb tsa, kho vajtse tsis raug (HAT hom mismatch), lossis tsis raug vaj huam sib luag qhov loj me. Ua hauj lwm los ntawm cov kev teeb tsa tsis zoo no siv lub tsev qiv ntawv cov khoom siv sim, kho ib qho kev hloov pauv ntawm ib lub sij hawm, ua ntej xaus tias muaj teeb meem kho vajtse.
