turcu_dan Posted October 19, 2016 Share Posted October 19, 2016 Salutare, anul trecut am cumparat de craciun de la Miv...om o instalatie de tip led la un pret destul de bun. De la prima conectare la retea, am observat ca led-urile sunt mai luminoase ca alte instalatii similare. Instalatia a functionat vre-o 12 zile dupa care sirul serie cu led-uri verzi+albastre n-a mai luminat. Probabil ca limitarea cu rezistentele serie nu era suficienta si unul sau mai multe led-uri a cedat. Exista vre-o modalitate de a depana sirul intrerupt sau nu se mai merita? Instalatia are in total 200 led-uri. Quote Link to comment Share on other sites More sharing options...
Electronicserver Posted October 19, 2016 Share Posted October 19, 2016 Daca merita sau nu depinde de buzunarul tau. E posibil ca tiristorul de comanda sa fie defect. Fa o proba scurta: conecteaza alimentarea de la sirul de leduri defect la sirul de leduri functional si de aici vezi unde e problema. Quote Link to comment Share on other sites More sharing options...
validae Posted October 19, 2016 Share Posted October 19, 2016 Se poate repara, dar ai nevoie de r?bdare de fier. Ai cel pu?in un led Quote Link to comment Share on other sites More sharing options...
elmar Posted October 19, 2016 Share Posted October 19, 2016 Se poate repara relativ u?or dac? ai un indicator de tensiune f?r? contact ...a?a poti identifica unde se Quote Link to comment Share on other sites More sharing options...
turcu_dan Posted October 19, 2016 Author Share Posted October 19, 2016 O sa verific daca e tiristorul. Indicatoarele de tensiune f?r? contact nu functioneaza numai in AC? Din cate stiu dupa controlerul care realizeaza jocul de lumini este CC. Quote Link to comment Share on other sites More sharing options...
turcu_dan Posted October 21, 2016 Author Share Posted October 21, 2016 (edited) Am mai g?sit o instala?ie identica func?ional? ?i am f?cut c Edited October 21, 2016 by turcu_dan Quote Link to comment Share on other sites More sharing options...
validae Posted October 21, 2016 Share Posted October 21, 2016 Curentul trebuie redus la cel mult 10mA pentru a avea o durat? de via?? acceptabil? a ledurilor, ?in Quote Link to comment Share on other sites More sharing options...
turcu_dan Posted October 21, 2016 Author Share Posted October 21, 2016 A?a am sa fac. O fi suficiente 2 rezistente de 1K Quote Link to comment Share on other sites More sharing options...
puriu Posted October 22, 2016 Share Posted October 22, 2016 Verificarea LED-urilor din siruri se poate face usor cu testere prevazute cu ace de cusut, care patrund usor prin PVC. Curentul indicat este de 8 mA pentru o viata lunga. Am doua ghirlande alb-galbui care functioneaza non-stop de mai mult de doi ani fara nici o victima. Quote Link to comment Share on other sites More sharing options...
turcu_dan Posted October 22, 2016 Author Share Posted October 22, 2016 In cele din urma am scos din sirul cu led-uri albastre rezistenta de 220R, si am inserat un led rosu, care are deja montata o rezistenta pe unul din terminale. Curentul prin sirul de led-uri albastre + verzi a scazut la 7mA. E ok acum. As mai avea o intrebare....... as putea conecta spre ex 4 instalatii led pe un singur controler? Quote Link to comment Share on other sites More sharing options...
validae Posted October 22, 2016 Share Posted October 22, 2016 Dac? tiristorii lui suport? curentul cerut, se poate.Po?i Quote Link to comment Share on other sites More sharing options...
turcu_dan Posted October 22, 2016 Author Share Posted October 22, 2016 Trebuie sa arunc o privire si sa vad ce tiristori are. Acesta ar fi potrivit : MCR22-6G? Curent de sarcin? max. 1.5A, curent de poart? 0.2mA. Quote Link to comment Share on other sites More sharing options...
validae Posted October 22, 2016 Share Posted October 22, 2016 Ar fi bun, dar s? te ui?i totu?i atent dac? Quote Link to comment Share on other sites More sharing options...
turcu_dan Posted October 22, 2016 Author Share Posted October 22, 2016 Cred ca este triac, PCR406X. Tensiunea la ie?ire pe fiecare ?ir este intre 90-93V . Controlerul are o singura dioda redresoare. C Quote Link to comment Share on other sites More sharing options...
validae Posted October 22, 2016 Share Posted October 22, 2016 Este tiristor PCR406 , dar chinezul l-a l?sat s? redreseze monoalternan??, ca s? scad? puterea disipat?. De obicei se pune tiristorul Quote Link to comment Share on other sites More sharing options...
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