Re: Fw: Stair LEDs

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

Since you have one in front of you ;-)

Are all the LED's wired back to a plug each, or are they in strings=20
of say two or three. What do you see?

The connectors I will have on the board are screw type ones.

Thanks

Ian


--- In ukha_d@xxxxxxx, "Neil Frost" <neil@...> wrote:
>
> OK, went to B&Q today... STAY AWAY FROM THE LIGHT!!!!!
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> couldn't resist.... bought the 10 LEDs for =A330....
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> So i would be Interested in the device too... please..
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> Thanks
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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 11:51
> To: ukha_d@xxxxxxx
> Subject: Re: Fw: [ukha_d] Stair LEDs
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> A quick update - already
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> I spent some time thinking about this last night along with all the
> other requirements already listed and I have two things to add.
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> 1) The LED outputs will be voltage switching ones and not current
> limited. This is because the resistors used in the current 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,=20
if
> using commercial LEDs they may have the current limiting resistors
> hidden in the 'string' somewhere and hence in the wrong place.
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> 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 more
> complicated but the end result should be rather sweet.
> The down side of this is the number of outputs goes to 16 but=20
that's
> life.
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> We shall see
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> Ian
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> --- 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
> >
> >=20
> > ----- 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=20
sort
> of
> > thing Gareth & Ian are aiming for :-)
> >
> > http://home.cc.umanitoba.ca/~umparekh/stair_lights.html
> >
> > Cheers,
> >
> > Tim.
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> Yahoo! Groups Links
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> [Non-text portions of this message have been removed]
>