[time-nuts] Transformers

David VanHorn D.VanHorn at elec-solutions.com
Mon Jun 27 19:12:40 UTC 2011

Locally, there was a radio station running PSAs to tell people to unplug their cell phone chargers "To save the environment".

I was very tempted to call in with some envelope calculations on the energy expended to send out the PSAs vs the energy saved.

It's not easy being green, but it's easy to LOOK green.

From: time-nuts-bounces at febo.com [time-nuts-bounces at febo.com] On Behalf Of Brooke Clarke [brooke at pacific.net]
Sent: Monday, June 27, 2011 1:12 PM
To: xformer at citynet.net; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Transformers


For small (say under 5 Watt) loads the old wall wart has bit the dust
(at least in California) because they waste power.  The new wall warts
don't use mains frequency transformers, but rather transformers running
is kHz frequencies.  You can tell because they are much smaller than the
old ones and much lighter as well as working on any mains voltage and
current in the world.

Have Fun,

Brooke Clarke

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