> As someone who has designed and built switching power supplies, the article brought back funny memories. Myself also. I designed switching power supplies for

> As someone who has designed and built switching power supplies, the article brought back funny memories. Myself also. I designed switching power supplies for the Space Shuttle, some of which were meant to power fluorescent lights. NASA wanted dimmable fluorescent lights in the crew quarters, but they also wanted no EMI. Well, they got both -- I figured out a way to dim the fluorescents using a magnetic amplifier instead of the semiconductor switching methods that were common at the time, and (as I intended) the magnetic amplifier created no interference at all. The details: http://arachnoid.com/PDF_archive/IES_october_1976.pdf http://arachnoid.com/PDF_archive/IES_october_1976.pdf