The basic idea of the USB drive is quite simple. When we connect it up to the USB port, an inverting DC/DC converter runs and charges capacitors to -110V. When the voltage is reached, the DC/DC is switched off. At the same time, the filed transistor opens. It is used to apply the -110V to signal lines of the USB interface. When the voltage on capacitors increases to -7V, the transistor closes and the DC/DC starts. The loop runs till everything possible is broken down.
Please enjoy jwz mixtape 150.
And today in "Youtube sucks" news --
Remember a while ago I complained that Youtube seemed to have removed the feature where you can set the start and end times of videos in a playlist, thwarting my ability to make my playlists skip over end credits and other noise? Well, the Shriekback fellows screwed up and left 4 minutes of black at the end of their video -- and I can't tell the playlist to omit it. So, you know, hit "Next" when that happens. Blah. (Oh, nevermind, I moved it to the end, even though it doesn't fit best there.)
Thanks, Youtube, you just get better every day in every way.