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Old 08-08-2009, 10:09 PM   #9 (permalink)
Master EcoModder
Join Date: Sep 2008
Location: Texas
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I'm currently working on a small DC/DC converter for my workstation. It converts 140-370v from rectified mains voltage to 13.8v at up to 1A for backup battery charging. I couldn't figure out why it was buzzing until I removed the load resistor and the buzzing slowed down to a clicking. Then I looked at the meter I had in series with my bench power supply and it was only using 5.3mW (33uA at 160v). I then realized that the converter was essentially P&Ging (which is known as "period skipping" in power supply design).

And no, I did not expect a simple 2 transistor DC/DC converter to "period skip"...
If America manages to eliminate obesity, we would save as much fuel as if every American were to stop driving for three days every year. To be slender like Tiffany Yep is to be a real hypermiler...

Allie Moore and I have a combined carbon footprint much smaller than that of one average American...
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