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> Faruri si lumini

Serpico
post 18 Nov 2010, 09:24
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QUOTE(laur @ 18 Nov 2010, 08:09)
Prin liceu am facut o cascadorie frumoasa zburind prin aer din cauza unui dinam ajuns intre spite.
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Multe city-bike-uri au acum prindere pentru dinam la roata spate din motivul asta.


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valimo
post 22 Nov 2010, 23:01
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Mi-am schimbat si eu lanterna.Am achizitionat una d-asta.
Imi place cum lumineaza fata de prostiile alea chinezesti.Am vazut ca are 54 de candela.Cat inseamna in lumeni?

This post has been edited by valimo: 22 Nov 2010, 23:02


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Liviu
post 22 Nov 2010, 23:17
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Lanterna aia scoate vreo 30 de lumeni ... poate 50-60 .. dar cu indulgenta mare.
Sincer, nu cred ca scoate 60 de lumeni ... ar insemna ca are mai multa eficienta luminoasa decat orice se numeste led de putere in zilele noastre.


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kog
post 24 Nov 2010, 13:38
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QUOTE(vis-a-vis @ 17 Nov 2010, 18:59)
Dinamul clasic, ala care e actionat de anvelopa mi se pare o mare prostie, poate or fi aparut vreunele mei de soi, dar mie mi s-au parut ca doar ingreuneaza miscarea rotii si n-ai curent constant. Uneori chiar iti trebuie lumina maxima cand incetinesti la o groapa sau o bordura, de ex. Eu m-am gandit la un dinam in butuc, dar sunt putine variante si scumpe. Sunt facute mai mult pt trekking si nustiu cat de rezistente sunt. Curentul maxim e de 6W. DEstul de slabut pentru un far capabil cum face Liviu 04.gif
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Acum ceva vreme am construit un prototip de dinam cu actionare tot pe roata, dar mult mai eficient, centrat bine, cu bucse sanatoase, putere mai mare, iar in loc de roata aia infecta de plastic care pe langa ca ingreuneaza mai mult, are aderenta slaba si roade cauciucul am montat una din cauciuc, asemanatoare cu alea care preseaza banda in magnetofoane. Ceva rezultate am avut, roata mergea mult mai usor, pentru ca am putut slabi si arcul fara sa pierd aderenta, lumina mai multa si mai puternica, nu mai scotea nici zgomot. La vremea respectiva nu se gaseau leduri de putere asa ca proiectul a fost abandonat, dintr-un bec nu prea poti scoate mare lucru orice i-ai face, e prea ineficient


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VladG
post 24 Nov 2010, 14:16
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Cele mai eficiente dinamuri sunt cele montate in butucul rotii fata. Nu mai pierzi deloc la transmiterea miscarii, insusi butucul e dinamul.


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khrysty@n
post 16 Jan 2011, 21:32
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Nothing new? biggrin.gif


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Liviu
post 18 Jan 2011, 14:41
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Un singur lucru nou ... caci am luat o pauza.

Mi-am facut o lanterna ptr bicla noua, un fel de surogat pentru cea din pipa (se poate observa aranjamentul lentilelor si tipul ledurilor folosite):

"Faza lunga" : ~700 lumeni, con 16 grade
"Faza scurta": ~400 lumeni, elipsa 16x40 grade


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2011_01_18_12.02.15.jpg ( Size: 205.47k ) Number of downloads: 297


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khrysty@n
post 18 Jan 2011, 16:40
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O intrebare...

Sunt 99.9% sigur ca toate farurile pe care le-ai facut, is boala...biggrin.gif "Vad", de te dor ochii...

Dar nu inteleg cum setezi aparatul ala foto, ca din poze zici ca are max 100 lm...

O poza tot in locul ala, din parc nu ai cu scula?


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Liviu
post 18 Jan 2011, 19:03
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In cazul asta, "aparatul foto" este un banal telefon. Din pozele "la perete" verau sa ilustrez doar cum arata proiectia fasciculului ..
Am sa fac si poze in parc, noaptea, dar sa se mai incalzeasca un pic afatra smile.gif

Oricum, asta lumineaza putin mai puternic (insisizabil cu ochiul liber) ca farul integrat in pipa - are aceleasi led-uri si aceleasi caracteristici, dar e setat un pic in overdrive.


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Liviu
post 22 Jan 2011, 18:33
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Si inca unul "pe comanda", facut dintr-un far "stock".
Putere luminoasa maxima: ~500 lumeni

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This post has been edited by Liviu: 22 Jan 2011, 18:46


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M i h a i
post 22 Jan 2011, 18:43
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QUOTE(Liviu @ 18 Jan 2011, 14:41)
"Faza lunga" : ~700 lumeni, con 16 grade
"Faza scurta": ~400 lumeni, elipsa 16x40 grade
*


intreb si eu in calitate de necunoscator...cum iti dai seama de lumeni? ai ceva cu care masori? unsure.gif la 700 lumeni inseamna ca esti vazut la aprox 450 m? unsure.gif


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Liviu
post 22 Jan 2011, 18:45
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Eu folosesc doar led-uri carora le stiu specificatiile de catalog.
De asemenea, stiu exact ce caracteristici au driverele pe care le folosesc, prin urmare, cunoscand curentul de comanda al ledurilor si caracteristicile date de producator, rezulta lumenii cu pricina smile.gif.
Daca minte producatorul, mint si eu .. dar nu cred ca CREE sau SEOUL (led-uri cu care lucrez) dau specificatii aiurea, fiind printre cei mai mari si renumiti producatori de leduri din lume.


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khrysty@n
post 23 Jan 2011, 19:11
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Aaaa... Vad bine?

Asta are si "pozitii"? biggrin.gif

Adica 2 leduri de putere si 2 leduri de 5mm? biggrin.gif


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bahrim II
post 14 Mar 2011, 22:11
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Esti electrician ?


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andreig1982
post 15 Mar 2011, 09:05
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este smile.gif
si cred ca o sa ma inscriu la o jucarie artizanala ca aia de aici
daca mai face Liviu asa ceva

This post has been edited by andreig1982: 15 Mar 2011, 10:02


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Liviu
post 17 Mar 2011, 00:12
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Jucaria aia artizanala se poate comanda de pe dealextreme cu totul .. e 36 USD. Mai adaugi niste baterii, un incarcator si un holder de ghidon si gata ... iesi in aceeasi bani si nu mai bricolezi nimic.


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andreig1982
post 17 Mar 2011, 09:29
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Liviu, as fi recunoscator dc mi-ai recomanda un model de la ei smile.gif


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Liviu
post 20 Mar 2011, 12:17
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andreig1982
post 20 Mar 2011, 15:13
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multumesc pt sfaturi
acum sa ma hotarasc
lanterna+holder+baterii+charger ar fi cam 50 euro dar poate fi folosita oricand pt orice
farul 70 de euro si merge cam doar pe bicla


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Liviu
post 21 Mar 2011, 10:29
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nu e chiar asa .. poti folosi farul pe post de lanterna .. ca doar nu il sudezi de cadru .... dar da, nu e la fel de compact ca o lanterna ...


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Tamango
post 30 Mar 2011, 09:15
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Liviu, ce parere ai de asta: http://cgi.ebay.com/CREE-Q5-240-lumen-LED-...=item45f8195067

Mi se pare mai ieftina decat pe DX


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Liviu
post 2 Apr 2011, 16:01
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Da, e ok daca nu ai pretentii mari smile.gif ... si nu e mai ieftina ca pe DX:
http://www.dealextreme.com/p/x2000-flood-t...ght-3-aaa-13732


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Tamango
post 3 Apr 2011, 19:15
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multumesc Liviu, in capul meu e o varza totala ... zi-mi care e faza cu LED-urile astea ? Care lanterna e mai buna, una cu Cree XR-E P4, Q3-WC sau Q5 ... sau LED Luxeon ? Ce anume sa caut ?

Gata, am comandat totusi asta: http://www.dealextreme.com/p/flood-to-thro...unt-3-aaa-26800

This post has been edited by Tamango: 3 Apr 2011, 21:22


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marius80_eugen
post 4 May 2011, 09:17
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Exact pe asta o gasesti la 40-50 ron in targ la Vitan . Problema este ca in timp , focalizarea se slabeste si la trepidatii te trezesti cu "zoom-ul" modificat .


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Tamango
post 4 May 2011, 18:46
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Gata, mi-a venit comanda, cam tarziu, a durat 1 luna dar ma gandesc ca din cauza sarbatorilor ... stiu ca e 50 lei in Vitan dar fara mount. Asa m-a costat 36 cu tot cu suport. Nu-mi vine sa cred ce luminoasa e, merita banii ...

Later edit:
Pentru problema focalizarii o sa-mi iau niste o-ring-uri tot de la ei.
Asa arata "agregatul":
bike_lights_003.jpg ( Size: 117.28k ) Number of downloads: 233


Si o comparatie cu vechiul far:
bike_lights_005.jpg ( Size: 85.24k ) Number of downloads: 215


Si pentru curiosi, un ghid oficial de la Cree cu denumirile si specificatiile led-urilor:
http://www.cree.com/products/pdf/XLamp7090XR-E_B&L.pdf

This post has been edited by Tamango: 4 May 2011, 20:55


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mumus
post 4 May 2011, 21:25
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c-am la ce distanta bate? o poza noaptea?


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Tamango
post 4 May 2011, 22:38
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Nu-mi dau seama, cred ca 150 m ... am facut o poza de pe balcon dar nu ma prea pricep la poze noaptea. Copacul ala e cam la 50m in fata, am facut zoom pe el:

bike_lights_009.jpg ( Size: 837.79k ) Number of downloads: 245


Edit, asta e tot ce pot scoate cu aparatul asta. Deci acelasi copac la 50m:
bike_lights_012.jpg ( Size: 551.04k ) Number of downloads: 210


Si unul mai departe cu vreo 20-30 m:
bike_lights_013.jpg ( Size: 505.03k ) Number of downloads: 190


Ledul de pe lanterna mea e destul de slabut, Cree P4 WC (adica white 5000-10000 k, gen xenon) ... daca vreti ceva mai puternic cautati lanterna cu Cree Q3, 4 sau chiar 5 smile.gif

This post has been edited by Tamango: 4 May 2011, 22:55


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zanzie
post 5 May 2011, 09:58
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Fasciculul de lumina se mai poate dispersa?


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Tamango
post 5 May 2011, 10:44
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Da, e cu zoom ... si am descoperit ca lentila e din plastic sad.gif O sa comand una de sticla ...

This post has been edited by Tamango: 5 May 2011, 10:45


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mumus
post 5 May 2011, 16:27
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super , eu zic ca lumineaza mai mult decat suficient.


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