[sdiy] wall warts--wishful thinking

[Scott Gravenhorst]

Oh goody, I can't wait.

I remember my tech days at the L.A. Daily News where I got Dranetz training.
 One thing they told us is that switching supplies plugged into the same
power circuit can have a tendancy to become synchronized and because of that,
they all demand power at nearly the same times.  Sure enough, this effect was
bad enough to see on an oscope, I think it was 9x line frequency.  This
effect caused some of the computers to crash until they were moved to cleaner
lines.



"phillip m gallo" <philgallo at attglobal.net> wrote:
>Regarding external linear power supplies (DC wall warts) for those in the
>State of California.  New efficiency regulations will pretty well eliminate
>the use of non-switching power supplies starting next summer.  Those who use
>AC wall warts will be ok (for the time being).
>
>http://powerelectronics.com/mag/power_new_energy_standards/
>
>regards,
>p
>
>

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