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Upravo stiglo
Risto Offline
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#921
01-13-2015, 01:45 PM (This post was last modified: 01-13-2015, 01:46 PM by Risto.)
Osvezenje da se procita malo domace strucne literature. Ako izuzmem tekstove sa foruma Big Grin


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Braca Offline
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#922
01-13-2015, 07:03 PM (This post was last modified: 01-13-2015, 07:12 PM by Braca. Edit Reason: Dopuna )
Čekajući Godoa, odn. Macolin LLC...

...stiže mi danas kineski SMPS300RE sa naponom od +-45V. Prvi test na Gošinim otpornicima na 2x50W (sve u niškom fazonu, u pozadini sviri Nebojšin DAC - izem ti zemlju koja Niš nema Vaistinu), a zatim jednokanalno sa Hypex UcD180ST (imam samo jedan komad) na koji je zakačen BBC LS3/5a. Totalna tišina na parznom hodu, ali mi signal nosioca na zvučniku povremeno nije baš tako čist kao sa UcD180HG i linearnim ispravljačem. Medjutim, pošto je sve na stolu i spojeno dugačkim žicama nije baš za poredjenje sa skutijanim pojačalom.
Pri slušanju muzike ne primećujem nikakve anomalije, ali uz rezervu da mi je zvučnik na polici za knjige, nekih 50cm iznad glave.
Sledi montaža u kutiju sa 2xUcD180 starije gradnje, a onda slušanje. Medjutim, neće moći odmah - dodje mi iznenada posao iz firme, tako da ću neko vreme morati da provedem pri nekim drugim snagama, proračunavajući Dizel motore od nekih 10MW. Murphy-jev zakon: tri meseca se nisu javljali, i baš danas se setili da me ima.

Pozdrav

P.S. Slika na osciloskopu je muzika!

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TDA Offline
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#923
01-13-2015, 07:31 PM
Big Grin
A čemu služi indukciona ploča?
Face up...make your stand and realise you're living in the golden years!
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euronymous Offline
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#924
01-13-2015, 07:39 PM
(01-13-2015, 07:31 PM)TDA Wrote: Big Grin
A čemu služi indukciona ploča?

Da LLC dostigne radnu temperaturu Big Grin
"Ako kaniš pobjediti, ne smiješ izgubiti" - Grunf
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Braca Offline
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#925
01-13-2015, 07:41 PM
(01-13-2015, 07:31 PM)TDA Wrote: Big Grin
A čemu služi indukciona ploča?

Znao sam da će neko da pita Smile . Ispod nje je džezva za kafu, koju greju vrtložne struje ova dva digitalca Big Grin .

To je samo gornja ploča pregorelog rešoa - dobar električni izolator a podnosi i temperaturu, pa sam je koristio pri testu sa otpornicima.
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TDA Offline
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#926
01-13-2015, 09:21 PM
Ma skontao sam ja...
Greješ rakiju da se zgreješ tamo gore u Alpima... Big Grin
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samuki Offline
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#927
01-14-2015, 12:53 PM
Regulator od 0-30v i0-1A samo cu ga pojacati sa jacim tranzistorimaSmile


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Gosha Offline
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#928
01-14-2015, 01:10 PM
(01-14-2015, 12:53 PM)samuki Wrote: Regulator od 0-30v i0-1A samo cu ga pojacati sa jacim tranzistorimaSmile

Bolje je da ga pojacas sa jacim hladnjacima. Pri malim izlaznim naponima  imaces disipaciju na serijskom tranzistoru preko 30W disipacije.
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TDA Offline
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#929
01-14-2015, 01:19 PM
(01-14-2015, 12:53 PM)samuki Wrote: Regulator od 0-30v i0-1A samo cu ga pojacati sa jacim tranzistorimaSmile

Kita komplet! Big Grin
Samo udri samuki!

Ja nikako da sklopim nešto slično što sam započeo...
Malo lab napajanje sa LM317/337.
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Gosha Offline
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#930
01-14-2015, 01:28 PM (This post was last modified: 01-14-2015, 01:29 PM by Gosha.)
(01-14-2015, 01:19 PM)TDA Wrote:
(01-14-2015, 12:53 PM)samuki Wrote: Regulator od 0-30v i0-1A samo cu ga pojacati sa jacim tranzistorimaSmile

Kita komplet! Big Grin
Samo udri samuki!

Ja nikako da sklopim nešto slično što sam započeo...
Malo lab napajanje sa LM317/337.

Baci malo pogled na L200 regulator. Ja sam pre neku godinu skockao jedno napajanje sa ovim regulatorima (2X0-15V/1A) i to vrlo pristojno radi. 
Ne znam zasto svi zaobilaze ove regulatore  i odmah se fataju za LM317/337 a meni deluju superiornije 

http://www.farnell.com/datasheets/1689788.pdf
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TDA Offline
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#931
01-14-2015, 01:37 PM
Valjda zbog cene i nabavljivosti...
Face up...make your stand and realise you're living in the golden years!
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#932
01-14-2015, 01:47 PM (This post was last modified: 01-14-2015, 01:52 PM by samuki.)
(01-14-2015, 01:10 PM)Gosha Wrote:
(01-14-2015, 12:53 PM)samuki Wrote: Regulator od 0-30v i0-1A samo cu ga pojacati sa jacim tranzistorimaSmile

Bolje je da ga pojacas sa jacim hladnjacima. Pri malim izlaznim naponima  imaces disipaciju na serijskom tranzistoru preko 30W disipacije.

Stavicu na izlazu 2n3055 on je neunistiv i bez hladnjaka Smile

Tda , jes doslo u kitu , he he Smile

Zanimljiv mi je bio sto radi sa Lm 324 ic, pa cu vidjeti kako radi, ulazne diode 1n4007 slabe i dva kondeza od 1000mf ?
ako hocete stavicu shemu.
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Gosha Offline
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#933
01-14-2015, 01:50 PM
(01-14-2015, 01:37 PM)TDA Wrote: Valjda zbog cene i nabavljivosti...

Cena je ispod 200 din. a ima ga u vecini srpskih ducana.
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TDA Offline
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#934
01-14-2015, 01:56 PM
Potražiću ga. Hvala na savetu! Smile
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#935
01-14-2015, 06:20 PM
(01-14-2015, 01:50 PM)Gosha Wrote:
(01-14-2015, 01:37 PM)TDA Wrote: Valjda zbog cene i nabavljivosti...

Cena je ispod 200 din. a ima ga u vecini srpskih ducana.

Možda zato što je ovo samo pozitivni stabilizator a najčešće nam treba simetrično laboratorijsko napajanje. Ja bih probao da napravim taj mali lab PSU sa L200, posebno ako ima neka šema za simetrično napajanje sa dva L200.
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Milan_kg Offline
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#936
01-14-2015, 10:52 PM (This post was last modified: 01-14-2015, 10:57 PM by TDA. Edit Reason: Sređivanje videa... )
Danas mi je ovo stiglo.
Nije nesto mnogo korisna stvar za smd ali manje ce da me boli palac.


Sledeci korak je da kupim malo pneumatike i da napravim elektroniku za ovo.



Milan
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TDA Offline
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#937
01-14-2015, 10:58 PM
Vidi ti, vidi šta imenjak zna...
Pa evo ko će da nam peče SMD! Big Grin

Šalim se! Wink
Svaka čast!
Samo napred! Pratim te...
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#938
01-14-2015, 11:01 PM
Nema problema Smile

A sto se tice pecenja smd-a ako me ova rerna ne ubije bice dobro.
Nikako da spakujem sve ovo u neku pristojnu kutiju Smile


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TDA Offline
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#939
01-14-2015, 11:07 PM
Šaljem ti kutiju za ovo... Wink
Javi mi se na PP.
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samuki Offline
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#940
01-14-2015, 11:15 PM
Kako se zove ona pasta za Smd i gdje je nabaviti ?
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