[time-nuts] Hi Power LED Light power supply...

Bob Camp lists at rtty.us
Tue Sep 18 17:33:42 UTC 2012


Hi

... and if you take a hammer to one, they have a cheap little switcher built
right into the base of the bulb.

Bob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of K3WRY at aol.com
Sent: Tuesday, September 18, 2012 1:24 PM
To: time-nuts at febo.com
Subject: Re: [time-nuts] Hi Power LED Light power supply...

If you all check, they are using LEDs in traffic signals now by the  
thousands.  These are variations of multiple LEDs used in these signals and
they 
are all powered by 115vac thru the traffic controllers.
 
Joe  k3wry
 
 
In a message dated 9/18/2012 1:28:18 A.M. Eastern Daylight Time,  
mpb45 at clanbaker.org writes:

Time-Nutters--

I was wondering, after seeing some 100 watt  LED series
wired assemblies that were listed at 30-34 VDC @ 2.9A if  a
number of LEDs could be wired in series and powered directly
from a  rectified 110 VAC power source.   If enough LEDs are
wired in  series such that the peak DC voltage from the rectified
110 AC line does  not exceed the max current rating of the LEDs
this should eliminate any  excess current from flowing.  Obviously,
this does not provide for any  safety isolation from the line.
Hmmmmm....  Maybe if an  1:1 isolation transformer is used
except that it would be too heavy and  large....

Mike  Baker
----------------------


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