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Message from discussion Domanda stupida: led e pila da 9v

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Date: Wed, 30 May 2012 21:53:23 +0200
Message-ID: <CAJRxLvXxy80Wn02AriC2WE1bK3Z2durg70xeUFZAUcnU2Fd...@mail.gmail.com>
Subject: Re: Domanda stupida: led e pila da 9v
From: "Gianluca V." <martyg...@gmail.com>
To: hacklab-terni@googlegroups.com
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l'ho scritto sopra. cmq appena ho due secondi disegno il circuito
sbagliato che facevo(anche se apparentemente sembrava giusto) :DD



Il 30 maggio 2012 21:37, Emiliano <emilianodes...@gmail.com> ha scritto:
> ... e ci lasci cos=EC, senza svelarci l'arcano???
>
>
>
>
> Il giorno 30 maggio 2012 21:35, Gianluca V. <martyg...@gmail.com> ha
> scritto:
>
>> sono di rieti.....cmq ho risolto. ti ringrazio comunque.
>>
>> Il 30 maggio 2012 21:33, Marco Bettini <bettini.ma...@gmail.com> ha
>> scritto:
>> > ciao, senti, ma tu stai a Terni???
>> >
>> > se si io domani mattina sono al caos per installare del materiale, se
>> > vieni
>> > la con tutta la roba vorrei vedere anch'io tutto cio' che usi... se no=
n
>> > ti
>> > dispiace!
>> >
>> >
>> > Marco
>> >
>> >
>> > 2012/5/30 Gianluca <martyg...@gmail.com>
>> >>
>> >> Se preparo la breadboard =A0con una resistenza da 5600 omh e una pila=
 da
>> >> 9v e' normale che i led si brucino ugualmente?
>> >>
>> >> On 30 Mag, 16:53, "Gianluca V." <martyg...@gmail.com> wrote:
>> >> > devo comprare altre resistenze e provare.....
>> >> >ai a terni????
>> >
>> >
>> >
>> >>
>> >> > Il 30 maggio 2012 15:10, Marco Bettini <bettini.ma...@gmail.com> ha
>> >> > scritto:
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > > mah..
>> >> >
>> >> > > credo che una tolleranza del 20% per le alimentazioni non dia
>> >> > > minimamente
>> >> > > fastidio. se uno inverte lapolarit=E0 il diodo lavora in inversa,
>> >> > > causando
>> >> > > l'accensione ma per poco tempo, in bassa luminosit=E0 e fino alla
>> >> > > rottura.
>> >> >
>> >> > > Altrimenti sucsa, parti in modo empirico da 4,7k a scendere
>> >> >
>> >> > > 2012/5/30 Carla Chicchiero <superto...@gmail.com>
>> >> >
>> >> > >> io verificherei la tensione fornita dalla pila, magari =E8 difet=
tosa
>> >> > >> e
>> >> > >> d=E0
>> >> > >> pi=F9 di 9V. Oppure prova a cambiarla con un'altra.
>> >> >
>> >> > >> Il giorno 30 maggio 2012 13:23, Marco Bettini
>> >> > >> <bettini.ma...@gmail.com> ha
>> >> > >> scritto:
>> >> >
>> >> > >>> io verificherei che non inverti il negativo con il positivo....
>> >> >
>> >> > >>> 2012/5/30 Gianluca <martyg...@gmail.com>
>> >> >
>> >> > >>>> La maledizione continua.......ho attaccato il led e la
>> >> > >>>> resistenza
>> >> > >>>> che
>> >> > >>>> mi avete dato ieri sera. Il Led si acceso per un nano
>> >> > >>>> secondo........lo ricorderemo come un grande e valoroso led...
>> >> >
>> >> > >>>> Forse e' la pila che spara troppo?
>> >> >
>> >> > >>>> On 29 Mag, 09:35, "Gianluca V." <martyg...@gmail.com> wrote:
>> >> > >>>> > la legge di omh l'ho applicata....forse ho attaccato male il
>> >> > >>>> > tutto......oggi vi disegno il mio schema......penso anche di
>> >> > >>>> > venire
>> >> > >>>> > questa sera
>> >> >
>> >> > >>>> > Il 29 maggio 2012 08:41, Marco Bettini
>> >> > >>>> > <bettini.ma...@gmail.com>
>> >> > >>>> > ha
>> >> > >>>> > scritto:
>> >> >
>> >> > >>>> > > mah... dal difetto che dici non e'che lo hai attaccato al
>> >> > >>>> > > contrario
>> >> > >>>> > > ??? (
>> >> > >>>> > > positivo e negativo invertiti )
>> >> >
>> >> > >>>> > > ineffetti dal difetto potrebbe sembrare anche un accension=
e
>> >> > >>>> > > in
>> >> > >>>> > > inversa.
>> >> >
>> >> > >>>> > > Vedi te.
>> >> >
>> >> > >>>> > > Marco
>> >> >
>> >> > >>>> > > 2012/5/29 Daniele Betti <daniele.betti.m...@gmail.com>
>> >> >
>> >> > >>>> > >> QUI =E8 spiegato come calcolarlo
>> >> >
>> >> > >>>> > >> (voltaggio in entrata - voltaggio totale dei led) /
>> >> > >>>> > >> assorbimento
>> >> > >>>> > >> dei led
>> >> > >>>> > >> in mA
>> >> > >>>> > >> (9-1,4) : 0,02 =3D 380
>> >> >
>> >> > >>>> > >> Sei sicuro sui dati del led?
>> >> > >>>> > >> Puoi provare con una batteria da 1,5 e vedere se funziona
>> >> >
>> >> > >>>> > >> Il giorno 29 maggio 2012 00:24, Marco Bettini
>> >> > >>>> > >> <bettini.ma...@gmail.com> ha
>> >> > >>>> > >> scritto:
>> >> >
>> >> > >>>> > >>> diciamo pure che dalla tua misura va bene, solo che
>> >> > >>>> > >>> dobbiamo
>> >> > >>>> > >>> tenere conto
>> >> > >>>> > >>> dlela corrente che passa attraverso il led. Quindi che
>> >> > >>>> > >>> dovresti
>> >> > >>>> > >>> usare un bel
>> >> > >>>> > >>> 4700 ohm.
>> >> >
>> >> > >>>> > >>> Marco
>> >> >
>> >> > >>>> > >>> 2012/5/29 Gianluca V. <martyg...@gmail.com>
>> >> >
>> >> > >>>> > >>>> anch'io pensavo fosse cosi......invece niente.......da'
>> >> > >>>> > >>>> un
>> >> > >>>> > >>>> colore
>> >> > >>>> > >>>> rossiccio........e piano piano si spegne........nemmeno
>> >> > >>>> > >>>> posso
>> >> > >>>> > >>>> toccarlo
>> >> > >>>> > >>>> per quanto scotta.
>> >> >
>> >> > >>>> > >>>> Anche se metto piu resistenze in serie......sempre il
>> >> > >>>> > >>>> solito
>> >> > >>>> > >>>> risultato.....si sente addirittura puzza di
>> >> > >>>> > >>>> bruciato........
>> >> >
>> >> > >>>> > >>>> puo essere la pila da 9v ad essere anomala?
>> >> >
>> >> > >>>> > >>>> Il 28 maggio 2012 23:55, Andrea Belloni
>> >> > >>>> > >>>> <anbe...@gmail.com>
>> >> > >>>> > >>>> ha
>> >> > >>>> > >>>> scritto:
>> >> > >>>> > >>>> > con 330 ohm il led vede 23 mA invece di 20, non penso
>> >> > >>>> > >>>> > proprio
>> >> > >>>> > >>>> > che quei
>> >> > >>>> > >>>> > 3 mA
>> >> > >>>> > >>>> > in pi=F9 possano creare problemi
>> >> > >>>> > >>>> > vai tranquillo con la resistenza da 330
>> >> >
>> >> > >>>> > >>>> > ciao
>> >> >
>> >> > >>>> > >>>> > Il giorno 28 maggio 2012 21:16, Gianluca
>> >> > >>>> > >>>> > <martyg...@gmail.com>
>> >> > >>>> > >>>> > ha
>> >> > >>>> > >>>> > scritto:
>> >> >
>> >> > >>>> > >>>> >> Io ho un led di colore giallo da 1,4v 0,02 A =A0e =
=A0una
>> >> > >>>> > >>>> >> pila
>> >> > >>>> > >>>> >> da
>> >> > >>>> > >>>> >> 9v
>> >> >
>> >> > >>>> > >>>> >> Facendo la legge di omh
>> >> >
>> >> > >>>> > >>>> >> R =3D 9-1,4 : 0,02
>> >> >
>> >> > >>>> > >>>> >> viene fuori 380 omh
>> >> >
>> >> > >>>> > >>>> >> io ho solo resistenze da 330 omh
>> >> >
>> >> > >>>> > >>>> >> per avere una luce gialla devo mettere una resistenz=
a
>> >> > >>>> > >>>> >> proprio
>> >> > >>>> > >>>> >> di 390
>> >> > >>>> > >>>> >> omh?
>> >> >
>> >> > >>>> > >>>> >> Scusate la domanda stupida. Sto iniziando da
>> >> > >>>> > >>>> >> pochissimo.
>> >> >
>> >> > >>>> > >>>> >> Grazie. Gianluca.
>> >> >
>> >> > >>>> > >>> --
>> >> > >>>> > >>> Marco Bettini Soluzioni Informatiche
>> >> > >>>> > >>> via Emilia Levante 144/4
>> >> > >>>> > >>> 40139 Bologna
>> >> > >>>> > >>> P.I. 02379501204
>> >> > >>>> > >>> C.F. BTTMRC74T11L117Q
>> >> > >>>> > >>> N.tel : +39-05119907013
>> >> > >>>> > >>> N.cell.: +39-3663269252
>> >> > >>>> > >>> Messagenet: +39-07441906072
>> >> > >>>> > >>> Fax: +39-0510544722
>> >> > >>>> > >>>http://www.si2.it
>> >> > >>>> > >>> Solo il 10% di UNIX e' in codice assembly il resto e' C!=
!
>> >> > >>>> > >>> Only about 10 % of UNIX is assembly code the rest is C!!
>> >> > >>>> > >>> Gli antichi credevano che al di l=E0 delle Colonne d'Erc=
ole
>> >> > >>>> > >>> ci
>> >> > >>>> > >>> fosse
>> >> > >>>> > >>> Chuck
>> >> > >>>> > >>> Norris.
>> >> > >>>> > >>> The ancients believed that beyond the Pillars of Hercule=
s
>> >> > >>>> > >>> there
>> >> > >>>> > >>> was Chuck
>> >> > >>>> > >>> Norris
>> >> > >>>> > >>> Il contenuto di questa e-mail =E8 strettamente personale=
 ai
>> >> > >>>> > >>> sensi
>> >> > >>>> > >>> della
>> >> > >>>> > >>> legge 196/03. Ogni abuso potr=E0 essere perseguito
>> >> > >>>> > >>> legalmente.
>> >> >
>> >> > >>>> > > --
>> >> > >>>> > > Marco Bettini Soluzioni Informatiche
>> >> > >>>> > > via Emilia Levante 144/4
>> >> > >>>> > > 40139 Bologna
>> >> > >>>> > > P.I. 02379501204
>> >> > >>>> > > C.F. BTTMRC74T11L117Q
>> >> > >>>> > > N.tel : +39-05119907013
>> >> > >>>> > > N.cell.: +39-3663269252
>> >> > >>>> > > Messagenet: +39-07441906072
>> >> > >>>> > > Fax: +39-0510544722
>> >> > >>>> > >http://www.si2.it
>> >> > >>>> > > Solo il 10% di UNIX e' in codice assembly il resto e' C!!
>> >> > >>>> > > Only about 10 % of UNIX is assembly code the rest is C!!
>> >> > >>>> > > Gli antichi credevano che al di l=E0 delle Colonne d'Ercol=
e ci
>> >> > >>>> > > fosse
>> >> > >>>> > > Chuck
>> >> > >>>> > > Norris.
>> >> > >>>> > > The ancients believed that beyond the Pillars of Hercules
>> >> > >>>> > > there
>> >> > >>>> > > was
>> >> > >>>> > > Chuck
>> >> > >>>> > > Norris
>> >> > >>>> > > Il contenuto di questa e-mail =E8 strettamente personale a=
i
>> >> > >>>> > > sensi
>> >> > >>>> > > della legge
>> >> > >>>> > > 196/03. Ogni abuso potr=E0 essere perseguito legalmente.
>> >> >
>> >> > >>> --
>> >> > >>> Marco Bettini Soluzioni Informatiche
>> >> > >>> via Emilia Levante 144/4
>> >> > >>> 40139 Bologna
>> >> > >>> P.I. 02379501204
>> >> > >>> C.F. BTTMRC74T11L117Q
>> >> > >>> N.tel : +39-05119907013
>> >> > >>> N.cell.: +39-3663269252
>> >> > >>> Messagenet: +39-07441906072
>> >> > >>> Fax: +39-0510544722
>> >> > >>>http://www.si2.it
>> >> > >>> Solo il 10% di UNIX e' in codice assembly il resto e' C!!
>> >> > >>> Only about 10 % of UNIX is assembly code the rest is C!!
>> >> > >>> Gli antichi credevano che al di l=E0 delle Colonne d'Ercole ci
>> >> > >>> fosse
>> >> > >>> Chuck
>> >> > >>> Norris.
>> >> > >>> The ancients believed that beyond the Pillars of Hercules there
>> >> > >>> was
>> >> > >>> Chuck
>> >> > >>> Norris
>> >> > >>> Il contenuto di questa e-mail =E8 strettamente personale ai sen=
si
>> >> > >>> della
>> >> > >>> legge 196/03. Ogni abuso potr=E0 essere perseguito legalmente.
>> >> >
>> >> > > --
>> >> > > Marco Bettini Soluzioni Informatiche
>> >> > > via Emilia Levante 144/4
>> >> > > 40139 Bologna
>> >> > > P.I. 02379501204
>> >> > > C.F. BTTMRC74T11L117Q
>> >> > > N.tel : +39-05119907013
>> >> > > N.cell.: +39-3663269252
>> >> > > Messagenet: +39-07441906072
>> >> > > Fax: +39-0510544722
>> >> > >http://www.si2.it
>> >> > > Solo il 10% di UNIX e' in codice assembly il resto e' C!!
>> >> > > Only about 10 % of UNIX is assembly code the rest is C!!
>> >> > > Gli antichi credevano che al di l=E0 delle Colonne d'Ercole ci fo=
sse
>> >> > > Chuck
>> >> > > Norris.
>> >> > > The ancients believed that beyond the Pillars of Hercules there w=
as
>> >> > > Chuck
>> >> > > Norris
>> >> > > Il contenuto di questa e-mail =E8 strettamente personale ai sensi
>> >> > > della
>> >> > > legge
>> >> > > 196/03. Ogni abuso potr=E0 essere perseguito legalmente.
>> >
>> >
>> >
>> >
>> > --
>> > Marco Bettini Soluzioni Informatiche
>> > via Emilia Levante 144/4
>> > 40139 Bologna
>> > P.I. 02379501204
>> > C.F. BTTMRC74T11L117Q
>> > N.tel : +39-05119907013
>> > N.cell.: +39-3663269252
>> > Messagenet: +39-07441906072
>> > Fax: +39-0510544722
>> > http://www.si2.it
>> > Solo il 10% di UNIX e' in codice assembly il resto e' C!!
>> > Only about 10 % of UNIX is assembly code the rest is C!!
>> > Gli antichi credevano che al di l=E0 delle Colonne d'Ercole ci fosse C=
huck
>> > Norris.
>> > The ancients believed that beyond the Pillars of Hercules there was
>> > Chuck
>> > Norris
>> > Il contenuto di questa e-mail =E8 strettamente personale ai sensi dell=
a
>> > legge
>> > 196/03. Ogni abuso potr=E0 essere perseguito legalmente.
>
>
>
>
> --
> Emiliano-LimeOnai
> www.flickr.com/photos/emiliano_design/=A0 (Personal Foto Blog)
> www.myspace.com/emilianodesign=A0=A0 (Personal Space)
> www.myspace.com/seven7sense=A0 (Art Group Space)
> www.flickr.com/photos/seventhsense/sets/=A0 (Art Group Foto Blog)

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