Re: LED and Grain of Wheat bulbs
- From: google@xxxxxxxxxxxxxxxxxxxxxx
- Date: 19 Jan 2006 03:55:57 -0800
Malcolm wrote:
> >
> > Can you dim an LED ?
>
> Yes you can, but you won't get the same effect as dimming a GOW bulb.
> Two ways to dim a LED is to increase the series resistor thus limiting
> the amount of current and thus the brightness. The other is by sending
> a pulse width modulated signal, which requires additional circuitry and
> IMO never looks right as you can often detect the flicker.
>
> I have a few old gas street lamps on our N scale layout, modified to
> light up via fibre optics. When I used an ultra-bright white LED the
> lamps looked good, but not right, the light was too white. I then
A brush with a yellow highlighter pen can help. You can also now buy
"golden" or "sunny" white LEDs.
White LEDs often look too "blue" or cold as they are actually blue LEDs
with a phosphor layer which emits white light when excited by the blue
from the LED chip.
Andrew
.
- References:
- LED and Grain of Wheat bulbs
- From: Robert Wilson
- Re: LED and Grain of Wheat bulbs
- From: Andy Sollis- Churnet Valley model Railway Dept.
- Re: LED and Grain of Wheat bulbs
- From: Malcolm
- LED and Grain of Wheat bulbs
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