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Zona libera Aici poti aborda orice subiect, in limitele decentei


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Old 06-03-2018, 22:06   #721
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Quote:
Originally Posted by Miru View Post
Cablurile aparatului. Nu e cine știe ce, totuși la voltaj īmi dă ok, am comparat cu unul mai bun. Nu știu ce să zic, dar totuși voltajul pe ieșire este 3,15, ziceai că nu e rău. Undeva nu calculez eu bine cred.
3.15v e la leduri nu, intre firul rosu si negru de pe placuta lor?
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Old 06-03-2018, 22:08   #722
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Da, am măsurat placa cu ledurile pornite. 3,15 v. Aparatul este un dt9205a. Nu e cine știe ce.

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Old 06-03-2018, 22:31   #723
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La voltaj/amperaj basic nu prea conteaza ce aparat e, majoritatea sunt destul de precise. Ideal ar fi sa desfaci un cablu de pe pcb, si sa masori amperajul de la leduri ca ala e ce conteaza. Daca ai in jur de 3A acolo e clar, ai ~1300lm.
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Old 06-03-2018, 22:44   #724
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Nu are cum sa fie 1300 lumeni, plm, doar nu e prima lanterna care o butonez, nu-mi dau seama cum plm este calculata treaba acolo. Fet-ul ala de pe circuit duce pana in 50 W la 25 grade si 20 W la 100 grade. Totusi cat amperaj primeste fiecare led? Dupa cum am zis lanterna se incalzeste bine dupa 20 de minute, capul e fierbinte. Si 20W sa aibe si tot iese vreo 2000 lumeni, da-o dreq.
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Old 06-03-2018, 22:55   #725
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Pai la asta ma gandesc si eu, ca n-are cum sa aiba atat. E un mister pe undeva pe-acolo.

Eu cand masor, masor voltajul pe pastila cu leduri si amperajul cu clampmetrul in acelasi timp. Ti-ar fi utila o dracie de-asta acum.

Asta-i al meu, e foarte precis btw. Cauta si review-uri.

http://www.uni-trend.com/productsdet...773&CateId=773

~100-120 Ron de la fratii chinezi.
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Old 06-03-2018, 23:02   #726
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Hai ca e misto, nu am nevoie de review-uri, oricum nu stiu prea multe despre ele. Pot oare masura amperajul pe placuta cu led-uri la bornele +/-? Ai incercat asa ceva?
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Old 06-03-2018, 23:14   #727
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De la borne nu, dar fiind clampmetru doar prinzi un fir care duce spre leduri intre ghearele lui si-ti da amperajul. Non-contact, nu trebuie sa dezlipesti nimic. Clampmeter rulz!
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Old 06-03-2018, 23:15   #728
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Uite, driver pentru sky 3xT6 care are iesire de 2300 mAh pentru leduri in paralel. Daca are 2300x3 = 6900 adica 750 lm pe led x 3 = 2250 lm. Corect?
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Old 06-03-2018, 23:19   #729
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Daca sunt in paralel si el da 2.3A total, atunci fiecare led primeste 2.3/3 = 0.76A.

L.E. La fel vad ca zice si asta in review:
https://www.fasttech.com/reviews/5288600/500251
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Old 06-03-2018, 23:23   #730
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[email protected] atunci. 760 mAh e foarte putin. Asta ar insemna undeva la aproape 1000 lumeni. Cam putin. Review-ul ala nu l-am citit.
Si din ce zice el ... 2200 mA per emitter on fresh cells. Iar ... 3.15 amps out on cells at 3.7V, which is 520 mA per emitter. Cateva posturi in urma am zis ca sub 3.7 v si la mine scade in intensitate.

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Old 06-03-2018, 23:47   #731
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Daca sunt in paralel mi se pare ciudat sa dea "2300mA" ca output al intregului driver. Ca fiecare LED sa primeasca 2.3A ar trebui ca driverul sa scoata 6.9A, lucru care trebuiau sa-l scrie in specs. Dar daca ala care l-a pus pe 6xT6 a zis ca scoate 5.5A total, atunci ai dreptate.

Acum na, la 4.25$ merita doar de incercare. Eu am dat 20$ pe ala din TR-J12 )
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Old 07-03-2018, 00:01   #732
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Păi asta īnțeleg eu la paralel, amperaj mare cu același voltaj iar īn serie voltaj mare fără modificarea amperajului. De curiozitate, tu pe fandy cāt amperaj ai și ce voltaj ai pe leduri?
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Old 07-03-2018, 00:11   #733
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Stai ca o desfac acu'
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Old 07-03-2018, 00:37   #734
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Ha, te-am pornit. Hai că aștept rezultatele.
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Old 07-03-2018, 00:49   #735
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Din pacate, ca s-o desfac a trebuit sa fac praf ledurile. A fost atat de bine facuta incat a trebuit s-o stric la demontare. ) Reflectorul e din metal si prins cu surub prin interior. Dar n-am putut scoate driverul fara sa-l fac praf asa ca am preferat sa stric ledurile.

No biggie, sunt ieftine 3x XML T6 de 16mm. See why I like T6? )

Anyway, asa arata driverul de pe ea. Pare fain de tot, fiecare led pare a avea mini-driverul lui.





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Old 07-03-2018, 01:30   #736
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Īmi pare rău că a trebuit să strici ledurile. Arată foarte bine driver-ul, destul de bine īnchegat. Păcat că acum nu mai poți să o masori. Pffffff.
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Old 07-03-2018, 08:04   #737
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Dacă nu te grăbești, după ce fac reflow īți dau T6-urile mele. Chiar īmi pare rău că s-au stricat. Ce e mișto la astea cu 3 led-uri este că poți să pui 3 drivere separat pe ele de 3A. La mine doar să mă joc cu circuitul pot.
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Old 07-03-2018, 08:25   #738
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Nu-i bai, mersi frumos. Am dat deja comanda de 4 bucati, cu tot cu pastile de 16mm la 4.4$. Sa tot iei la banii astia. )

Chiar ma gandeam cum as putea sa o modific pe aia cu 11x T6... dar ar trebui sa dau cu 35A in ea la 3.3v. )
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Old 07-03-2018, 08:30   #739
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Te-ai grabit. 4.4 $ bucata sau toate 4?
Zau as modifica si eu circuitul, la lipeala ma pricep, dar nu stiu ce trebuie sa schimb sa nu stric mai tare. Daca as putea sa scot din fiecare led macar un 700-800 lm sa iasa per total 3500-4000 nu ar fi rau.

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Old 07-03-2018, 08:41   #740
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Toate 4, clar! 4.4$ bucata e deja pret de 1x XM-L U2, adica prea mult. )

https://www.aliexpress.com/item/2PCS...826282585.html

P.S. 99% nu e U2 chiar daca scrie in titlu.
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