To avoid color shifts with dimming, most LED dimmers use Pulse
Width Modulation (PWM). PWM has the potential to generate RFI,
so be careful. The LEDs themselves should be very quiet. Using
LEDs with resistors to limit the current should also be quiet. A
system that switches LEDs for brightness control would be a safe
solution, but I don't know of any commercial systems which do this.
On the other hand, I have not noticed a problem with the LED
dimmers in my house, so perhaps most of the problem is in the
wall-wart power supply.
73 Bill AE6JV
On 1/6/17 at 3:50 AM, [email protected] (Marc Veeneman
via Elecraft) wrote:
I mounted (dual side adhesive tape) an LED strip to the
underside of an equipment shelf. The strip came with a 12v
switcher that I ignored. I use my 12 volt supply. The strip
was, I think, 24 inches long and has a dimmer that can be
inserted in the power lead. No RFI. Plenty bright. Mine came
from Amazon but there are many to choose from these days; you
can even select color temperature when you order.
-----------------------------------------------------------------------
Bill Frantz | Truth and love must prevail | Periwinkle
(408)356-8506 | over lies and hate. | 16345
Englewood Ave
www.pwpconsult.com | - Vaclav Havel | Los Gatos,
CA 95032
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