crisstel.ro Matrice înlănțuibilă 8 x 8 LED electronică buton 5V

Arduino UNO și matricea de led-uri înlănțuibilă 8×8

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Matricea de led-uri 8×8 este o matrice înlănțuibilă capabilă sa afișeze șiruri de caractere sau sa creeze diverse efecte luminoase. Poți conecta mai multe matrici împreună, obținând astfel afișaje de dimensiuni oricât de mari.

La baza unei matrici se afla 2 circuite integrate 74HC595D.

matricea de led-uri înlănțuibilă 8×8 matrici circuite integrate 74HC595D

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matricea de led-uri înlănțuibilă 8×8 matrici circuite integrate 74HC595D

Acest circuite se numesc registre de deplasare sau shift registers (termenul echivalent în engleza). Un astfel registru de deplasare iți permite să controlezi 8 ieșiri digitale utilizând doar 3 pini ale plăcii Arduino (pini corespunzători intrărilor în matrice Clock, Latch și Data).

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Iar partea cu adevarat frumoasa este că și pentru două matrici ai nevoie tot de trei pini.

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Și pentru trei matrici la fel. Și tot asa, poți controla sute de matrici folosind exact trei pini.

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Arduino transmite pe pinul Data 8 biți (serial, unul după altul) câte unul pentru fiecare dintre cele 8 ieșiri.

Delimitarea între biți se realizează prin pinul Clock, comandat tot de către Arduino (citirea semnalului util se face atunci când semnalul Clock trece prin zero). Folosind pinul Latch valorile celor 8 biți sunt trimiși pe ieșire.

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Cum conectez o matrice la placa Arduino ?

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Conectarea unei matrici la placa Arduino se realizează foarte ușor. Îți sunt necesare 5 fire pe care le vei conecta …

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Conținutul acestui articol este în format PDF pus la dispoziție de specialiștii RoboFun.ro. Pentru a vizualiza apăsați butonul Preview iar pentru a descărca butonul Download.

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Arduino UNO și matricea de led-uri înlănțuibilă 8x8

  • Matricea de led-uri 8x8 este o matrice înlănțuibilă capabilă sa afișeze șiruri de caractere sau sa creeze diverse efecte luminoase. Poți conecta mai multe matrici împreuna, obținând astfel afișaje de dimensiuni oricât de mari. La baza unei matrici se afla 2 circuite integrate 74HC595D. Acest circuite se numesc registre de deplasare sau shift registers (termenul echivalent in engleza). Un astfel registru de deplasare iti permite sa controlezi 8 iesiri digitale utilizand doar 3 pini ale placii Arduino (pini corespunzatori intrarilor in matrice Clock, Latch si Data). Iar partea cu adevarat frumoasa este ca si pentru doua matrici ai nevoie tot de trei pini. Si pentru trei matrici la fel. Si tot asa, poti controla sute de matrici folosind exact trei pini. Arduino transmite pe pinul Data 8 biti (serial, unul dupa altul) cate unul pentru fiecare dintre cele 8 iesiri. Delimitarea intre biti se realizeaza prin pinul Clock, comandat tot de catre Arduino (citirea semnalului util se face atunci cand semnalul Clock trece prin zero). Folosind pinul Latch valorile celor 8 biti sunt trimisi pe iesire. Cum conectez o matrice la placa Arduino ? Conectarea unei matrici la placa Arduino se realizeaza foarte usor. Iti sunt necesare 5 fire pe care le vei conecta ca in tabelul urmator (2 fire reprezinta alimentarea matricei):

    Citește și:

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