Newsgroups: rec.arts.theatre.stagecraft
Subject: Re: Polarity Behringer Eurolight LC2412 BNC-Socket
References:    
Tim Mitchell  writes:

> In article , Brandon Anderson
>  writes
> >No, not contradictory.  I've seen lots of things grounding negative.
> >Convention?  It should be following the same convention as all of the other
> >equipment that uses BNC lights.
> >
> Up till recently, gooseneck lights were all incandescent, and lots of
> them were powered from AC straight off the power supply transformer,
> so there was no polarity convention.

When building LED replacements for goosenect lights, I think 
based on the discussion gone here is to build them in such way 
that they work with DC on both polarities and AC, so they will 
work with every device you plug them in that has right voltage 
for your circuit. You can easily make a LED lamp to work on DC 
at both polarities and also with AC by adding a small full wave 
rectifier to your LED lamp circuit. THis kidn of rectifiers are 
available as a small four wire component or you can build your own 
from four diodes. 

-- 
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web links and documents at 
http://www.epanorama.net/