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Old 09-11-2015, 10:13 AM #1
hempfield
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Panou LED DIY cu CXB3070

Salutare,

La rugamintea mai multor useri de pe sectiunea Ro pornesc acest thread in care voi descrie fiecare etapa din constructia unui sistem de iluminat performant bazat pe ultima generatie de leduri tip COB de la CREE : CXB3070.

Sistemul va fi compus din sase module individuale, fiecare functionand la o putere fixa de 50W si va acoperi o suprafata de aproximativ 1mp2.







Specificatiile ledurilor :

Quote:

CXB3070-0000-000N0HAB30G

Illumination Colour: Warm White
Colour Temperature: 3000 K
Luminous Flux/Radiant Flux: 8500 lm
Colour Rendering Index - CRI: 80
Luminous Intensity: -
Viewing Angle: 115 deg
If - Forward Current: 1.9 A
Vf - Forward Voltage: 36 V
Mounting Style: SMD/SMT
Series: CXB3070
Packaging: Tray
Brand: Cree, Inc.
Features: -
Height: 1.7 mm
Length: 27.35 mm
Maximum Operating Temperature: + 85 C
Minimum Operating Temperature: - 40 C
Package/Case: COB - Chip-on-Board
Width: 27.35 mm

Pentru alimentarea acestor leduri voi folosi drivere de stip 'step-up' DC/DC , alimentate la 12V .



Specificatii driver :

Quote:
50w LED driver

Input Voltage: DC9-24V
Waterproof Rank: Non-waterproof
Output Voltage: DC30-38V
Current: 1500mA
Storage Temperature:-20-80
Application: Fit for 1x50w led 10 in series and 5 in parallel
Function: Open circuit,Short circuit and Over

Atat ledurile cat si driverul vor fi montate pe cate un radiator tip DeepCool CK AM-209 .



Specificatii cooler:

Quote:
DeepCool CK-AM209 AMD Socket 65W CPU Cooler

Technical Specifications
Overall Dimension 102.5X80X55.5mm
Fan Dimension 80X80X25mm
Net Weight 224g
Bearing Type Hydro Bearing
Rated Voltage 12VDC
Operating Voltage 10.8~13.2VDC
Started Voltage 7VDC
Rated Current 0.19�10%A(MAX)
Power Input 2.25W
FAN Speed 2800�10%RPM
MAX.Air Flow 35CFM
Noise 30dB(A)

Pentru fixarea ledurilor pe radiator voi folosi suporti de montare de tip 571-2-2154857-2 :



Specificatii led holder:

Quote:
For Use With: Citizen Electronics CLL Array Family
Packaging: Bulk
Brand: TE Connectivity
Height: 4.1 mm
Length: 18.5 mm
Factory Pack Quantity: 500
Tradename: LUMAWISE
Width: 16.6 mm
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Old 09-11-2015, 10:30 AM #2
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Pentru a obtine niste surse de iluminat cat mai compacte si pentru a profita in acelasi timp de racirea activa a coolerului, driverele vor fi montate in partea de sus a ansamblului, deasupra ventilatorului, astfel incat fluxul de aer sa raceasca in acelasi timp si radiatorul driverului.

Prima etapa (si cea mai consumatoare de timp) a constat in marcarea gaurilor pentru fixarea suportilor :







Toleranta cotelor pentru acesti suporti este destul de mica si faptul ca trebuiau data doua gauri pentru fiecare suport in parte , perfect aliniate, mi-a dat ceva bataie de cap dar am reusit in cele din urma sa le aliniez asa cum trebuie.

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Old 09-11-2015, 10:37 AM #3
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O data finalizate gaurile de fixare a suportilor, a urmat aplicarea ledurilor pe radiatoare cu ajutorul unei paste termoconductoare si fixarea ferma pe pozitie cu ajutorul suportilor.









Dupa montare am verificat fiecare LED in parte pe un driver de 24W. Lumina este orbitoare, mai puternica decat orice alt led folosit de mine pana acum. La 50cm distanta de led, cu ochii inchisi lumina se resimte la fel ca atunci cand iti indrepti fata spre soare intr-o zi de primavara cu soare puternic. Ma intreb cum va fi la 50W . Dar oare la 117W (puterea maxima a ledurilor) ?




Va urma ...
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Old 09-11-2015, 10:45 AM #4
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Urmatorul pas consta in realizarea unor suporti ce vor fi atasati de ventilatoarele coolerelor pentru a permite montarea driverelor. Acestia vor fi lipiti de partea laterala a ventilatoarelor cu adeziv termic pentru o rigidizare sporita.

Dupa fixarea driverelor urmeaza partea de conectivitate (conectarea driverelor la leduri si conectarea in paralel a fiecarui driver cu ventilatorul atasat).
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Old 09-11-2015, 06:12 PM #5
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Dragut proiect! Vad ca alimentarea se face direct prin acei suporti? Are prindere cu surub pentru fir sau cum?
Un proiect destul de simplu de executat chiar si pentru incepatori (mai putin alinierea gaurilor), dar cu rabdare cred ca se rezolva si aia.. cum zice si vorba aia masoara de 10 ori si.. gaureste o data.
Succes si felicitari pentru munca curata si organizata executata in cadrul proiectului!
Later edit: Am o sursa stabilizata de 24V - 500W. Merge folosita cu acele drivere step up sau este prea la limita? Cate leduri de astea ar duce sursa, luand in calcul pierderile la step-up?
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Old 09-11-2015, 08:14 PM #6
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Multumim hemp!

De unde ai luat ledurile, daca nu sunt indiscret...ce ma intereseaza e cum ai facut la vama daca le-ai luat din Ciaina
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Old 09-11-2015, 09:31 PM #7
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intr-adevar, se gasesc greu ledurile astea. asa ca ma indoiesc ca o sa zica de unde le-a luat. cel mai sigur din afara, transport in xx zile, dar fara batai de cap.
la vama nu cred ca o sa ai probleme. spre ex. eu am luat doua becuri cu led din ciaina via ibei si n-a zis nimeni nimic. ca si pret faceau cam cat un cob din asta.
hemp! imi place ideea ca mergi pe un circuit cu voltaj inferior celui actual in Retea.
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Old 09-12-2015, 12:15 AM #8
hempfield
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Quote:
Originally Posted by exploziv View Post
Dragut proiect! Vad ca alimentarea se face direct prin acei suporti? Are prindere cu surub pentru fir sau cum?
Un proiect destul de simplu de executat chiar si pentru incepatori (mai putin alinierea gaurilor), dar cu rabdare cred ca se rezolva si aia.. cum zice si vorba aia masoara de 10 ori si.. gaureste o data.
Succes si felicitari pentru munca curata si organizata executata in cadrul proiectului!
Later edit: Am o sursa stabilizata de 24V - 500W. Merge folosita cu acele drivere step up sau este prea la limita? Cate leduri de astea ar duce sursa, luand in calcul pierderile la step-up?
Driverele astea accepta tensiuni de intrare intre 12 si 24V. Eficienta e maxima la tensiunea de 24V. Pe o sursa de 500W merg perfect 10 module, iar un modul acopera foarte bine un sfert de metru patrat.

Limitarea e data de cat poate duce sursa. Un driver suge fix 50W, iar coolerul mai papa si el vreo 3W.

Quote:
Originally Posted by eska View Post
intr-adevar, se gasesc greu ledurile astea. asa ca ma indoiesc ca o sa zica de unde le-a luat. cel mai sigur din afara, transport in xx zile, dar fara batai de cap.
la vama nu cred ca o sa ai probleme. spre ex. eu am luat doua becuri cu led din ciaina via ibei si n-a zis nimeni nimic. ca si pret faceau cam cat un cob din asta.
hemp! imi place ideea ca mergi pe un circuit cu voltaj inferior celui actual in Retea.
Pentru o astfel de investitie - 40 de euro ledul - trebuie sa iti asiguri transportul, asa ca am cumparat de pe magazine online precum DigiKey sau Mouser. Venind cu posta recomandata ca si scrisoare nu cred ca a mai trecut prin vama si a ajuns in mai putin de 36 de ore de cand am facut comanda.

Daca se vor dovedi pe atat de fiabile si de productive pe cat de puternice si performante sunt, investitia de -300$ e floare la ureche. Iar cantitatea neglijabila de caldura pe care o degaja constituie un foarte mare avantaj pentru mine.
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Old 09-12-2015, 12:52 AM #9
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Eu ma gandeam sa fac un panou de veg pt vre-un mp, poate 1.20 mp.. 9 module de astea ar fi mult? daca e asa.. 4 mi se par totusi putine, si ca acoperire si ca watti, as putea sa merg pe 9 si sa le fac dimabile.
aia 3W pt cooler, ii tragi din driver tu, sau din sursa de 12V? adica eu daca am sursa de 24V, o sa trebuiasca sa mai pun una de 12V pt coolere? Mi se pare ca se complica matzaraia de cabluri..
Care e pretul per modul? Ca-s sigur ca tu ai zis pe bucati cam cat te-a dus, dar sunt prea high sa caut si sa calculez!

Succes!
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Old 09-12-2015, 05:14 PM #10
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Am intrat iar pe forum dupa nspe luni si asta a fost primu thread citit si creca si ultimu ) Revin si eu cu poze detalii cand o sa fiu suficient de serios sa ma apuc de proiect,ca nu e chiar asa usor cum pare,de la departare Hai ziuaa buna si tineti forumu asta verde ca se cam ingalbeneste de la un timp
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