Re: Q: lamp dimmer / AC transformer
- From: "sammy@xxxxxxx" <spam@xxxxxxxxxx>
- Date: Sun, 01 May 2005 02:23:41 -0400
Hi,
try a motor speed controlor ie cieling fan. a lamp will cause transformer
to warm & buzz, eventually dimmer may quit.The cieling fan dimmers are not
rated at 600 watts but more like 250 watts-should serve you well. Also can
get anywhere slightly higher priced than the lamp ones, about $10 so still
reasonable.
LeucoB wrote:
> Hi all,
> I'm trying to make a variable dimmer for a 6 volt, 5 amp
> incandescent lamp ( microscope illuminator).
> Tried regulated variable DC sources, but at 5 amps they're not very
> efficient , ..huge and hot heatsinks!
> Was wondering if it might be a little more efficient ( size and heat)
> to use a standard triac based lamp dimmer on the input of a
> 120:6.3V @ ~8A transformer?
> Does the chopped waveform have any adverse effects on the transformer?
> Does it need some sort of smoothing?
> I do have a huge variac, but again, I'm trying to keep this PSU as
> small as possible.
> Thanks in advance!
>
.
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