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Rod Speed

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Rod Speed wrote
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Jeff wrote
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I think he is seriously over estimating the power usage of a
clock chip and LCD display. 1 Watt would be more like it.
5 Watts would be about right for an old mechanical stove clock.

You are, of course, neglecting the power supply losses.
Non switching regulators typically throw away half or
more of the power. The trend is away from them.

Well, we do seem to be arguing the number of angels dancing on pinheads. ;-)

Not really. Transformers draw significant power even when there is
no demand upon them. They just turn it into heat rather than work.

Plug in a wall wart with no load on it and measure the temperature
and current draw after an hour. That's a very tiny transformer.

Correct.

If you remove one tube form a two tube florescent
light fixture with an old fashioned transformer,

Thats not a transformer, thats a ballast, electrically very different.

it hardly changes power consumption at all.

Wrong. Those take very little power when turned off.

Those who claim you are a fool are apparently correct.

Never ever could bull**** its way out of a wet paper bag.