Re: Electronic dimmer as Variac
From: James Sweet (jamessweet_at_hotmail.com)
Date: 07/11/04
- Next message: James Sweet: "Re: Converting something that runs on batteries..."
- Previous message: DD: "Best DC-DC step-up converter?"
- In reply to:(deleted message) DaveC: "Electronic dimmer as Variac"
- Messages sorted by: [ date ] [ thread ]
Date: Sun, 11 Jul 2004 02:56:03 GMT
"DaveC" <me@privacy.net> wrote in message
news:0001HW.BD0EC25600339262F02845B0@news.individual.net...
> I want to turn up a switching power supply slowly after repairing it, so
as
> to see if anything else is damaged. I have no Variac, and I could use the
> series light bulb trick, but I already have a light dimmer I'm using as a
> variable-temperature control for my soldering iron that could do
double-duty
> in this application.
>
> I know that the SMPS, when running correctly, will be a load pulse at 75
kHx.
> Has anyone tried using a dimmer as an "electronic variac"? Is it feasible?
>
> Thanks,
> --
> DaveC
> me@privacy.net
> This is an invalid return address
> Please reply in the news group
>
This won't work, a light dimmer doesn't vary the voltage, it varies the duty
cycle, so if you plug a switching supply into one you'll fry it.
- Next message: James Sweet: "Re: Converting something that runs on batteries..."
- Previous message: DD: "Best DC-DC step-up converter?"
- In reply to:(deleted message) DaveC: "Electronic dimmer as Variac"
- Messages sorted by: [ date ] [ thread ]
Relevant Pages
|
