Re: Fw: Stair LEDs

["Ian Bird" <ian.bird@xxxxxxxxxxxxxx>]

Does the 12v box come to pieces? I am after where the resistors are=20
to limit the LED current. If not don't worry.

Thanks

Ian


--- In ukha_d@xxxxxxx, "Neil Frost" <neil@...> wrote:
>
> They are wired individually, they have what look like power plugs=20
you would find on the end of a wall wart...
> a bit like these: http://www.maplin.co.uk/images/full/35906i0.jpg
> They plug into a box which the 12v plugs into.
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> The wire to the LEDs is has 24awg on the side (if that helps)
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> The power adapter is 12v 200ma
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> Hope that helps... I've just taken some pics and will upload them=20
somewhere tonight....
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> Neil
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> ________________________________
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> From: ukha_d@xxxxxxx on behalf of Ian Bird
> Sent: Sat 18/03/2006 18:51
> To: ukha_d@xxxxxxx
> Subject: Re: Fw: [ukha_d] Stair LEDs
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> Since you have one in front of you ;-)
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> Are all the LED's wired back to a plug each, or are they in strings
> of say two or three. What do you see?
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> The connectors I will have on the board are screw type ones.
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> Thanks
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> Ian
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> --- In ukha_d@xxxxxxx, "Neil Frost" <neil@> wrote:
> >
> > OK, went to B&Q today... STAY AWAY FROM THE LIGHT!!!!!
> >=20
> > couldn't resist.... bought the 10 LEDs for =A330....
> >=20
> > So i would be Interested in the device too... please..
> >=20
> > Thanks
> >=20
> > Neil
> >
> > ________________________________
> >
> > From: ukha_d@xxxxxxx on behalf of Ian Bird
> > Sent: Sat 18/03/2006 11:51
> > To: ukha_d@xxxxxxx
> > Subject: Re: Fw: [ukha_d] Stair LEDs
> >
> >
> >
> > A quick update - already
> >
> > I spent some time thinking about this last night along with
all=20
the
> > other requirements already listed and I have two things to add.
> >
> > 1) The LED outputs will be voltage switching ones and not current
> > limited. This is because the resistors used in the current=20
limiting
> > version are dependent on the LED and since I have no control over
> > what may be hung off these this is a risk not worth taking. Also,
> if
> > using commercial LEDs they may have the current limiting=20
resistors
> > hidden in the 'string' somewhere and hence in the wrong place.
> >
> > 2) For my own application PWM is a really nice thing to have. To
> > this end I am modifying the design to incorporate a Maxim chip to
> > help with this. Samples ordered today and the programming gets=20
more
> > complicated but the end result should be rather sweet.
> > The down side of this is the number of outputs goes to 16 but
> that's
> > life.
> >
> > We shall see
> >
> > Ian
> >
> >
> > --- In ukha_d@xxxxxxx, Gareth Cook <g@...> wrote:
> > >
> > > Exactly that :-)
> > >
> > >  Gareth Cook
> > >  Tools and Process Architect
> > >  IBM SWG Sales - Lotus Park, Staines, TW18 3AG
> > >  Office: +44 (0)1784 445166 - Mobile: +44 (0)7980 445166
> > >  AIM Chat : TheBoyG - MSN Chat : chat@
> > >  email: g@xxxxxxx
> > >
> > >
> > > ----- Forwarded by Gareth Cook/UK/IBM on 17/03/2006 20:28
-----
> > >
> > > Discussion
> > > Main Topic
> > >
> > > ukha_d@xxxxxxx
> > > Today 20:24
> > >
> > > .
> > > Subject:
> > > .
> > > Re: Fw: [ukha_d] Stair LEDs
> > > .
> > > Category:
> > >
> > >
> > >
> > > Andy,
> > >
> > > There's a couple of videos on this site - I guess this is
the
> sort
> > of
> > > thing Gareth & Ian are aiming for :-)
> > >
> > > http://home.cc.umanitoba.ca/~umparekh/stair_lights.html
> > >
> > > Cheers,
> > >
> > > Tim.
> >
> >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
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> Yahoo! Groups Links
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