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visits member for 1 year, 2 months
seen Jul 1 '13 at 19:48

Electronics engineer for longer than I care to admit. Over a decade in motor control, another decade in design of advanced medical devices, embedded control for most of those years. Recent experience in aviation, military, underwater, HVAC, solid state lighting, sensing and control, wired and wireless communications applications and lots more.

Experienced enough to know I don't know it all. Will give any problem a try and am too stubborn to give up easily.

Not at all academic, I learn what I need to get a job done. I embrace opportunities to learn something new, and learn new things about electronics and software development every day.

HIGH QUALITY : FAST TO MARKET : LOW COST <= Pick any TWO

I'm also frustratingly verbose...


Jul
1
comment Does a computer use more electricity when charging USB devices?
The OP was referring to charging from a practical computer. While I have no doubt that one could artificially add dissipative elements which switch in under certain circumstances, to prove a point, that would constitute increased load, (for the purposes of trying to prove a point), and not increasing loss. But if there's a reasonable and practical power supply design that exhibits a negative loss function, and is not improved measurably in terms of cost or performance by eliminating the negative loss function, then I'd like to see it.
Jul
1
awarded  Editor
Jul
1
revised Does a computer use more electricity when charging USB devices?
grammatical improvement for clarification of meaning
Jun
29
comment Power to VAIO laptop ports while plugged in
The schematic here shows a laptop charger. The Y-capacitor causing most of the leakage current is shown as C11. The X-capacitor is C1.
Jun
29
answered Power to VAIO laptop ports while plugged in
Jun
29
answered Does a computer use more electricity when charging USB devices?
Jun
29
awarded  Supporter
Jun
29
awarded  Teacher
Jun
29
answered Adding a CRT display to my HP Mini laptop