Re: Dimming LV halogen lights

["Dr John Tankard" <jtankard@xxxxxxx>]

No, the normal torroidal transformers should not be used for dimming with
standard dimmers. The reason is that most dimmers chop up the normal
waveform using a triac or diac and they do not provide symmetrical outputs
on the +ve and -ve half cycles, this saturates the transformer core. This
could result in either the destruction of the transformer or a fuse.

You need to check with the manufacturer to see if the output is
symmetrical,
most using microcrontrolers _should_ be ok, if the code is correct.

John
jtankard@xxxxxxx
Building Links Page http://www.tankard.com/links.htm
Extra links to hotlinks@xxxxxxx please

> -----Original Message-----
> From: Raymond [mailto:Reb.barnett@xxxxxxx]
> Sent: 09 December 1999 14:11
> To: 'ukha_d@xxxxxxx'
> Subject: [ukha_d] Re: Dimming LV halogen lights
>
>
>
>
> > Some newer electronic tranformers can block the X10 signal (ask
Mike
> > Huggins).  Better off with the older wound type.  Or go for
> > mains halogens
> > and do away with the problem completely.
> >
> > M.
>
> Mains halogens are not really an option. This is a sort of 'designer'
> light that happens to use halogens. The 'transformer' does look like
> it's a wound type though - big metal block that looks like a
> transformer. Does this make dimming it any easier? 'A' level physics
> wasn't my stronger subject...
>
> Ray.
>
>


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