URI:
   DIR xkcd - A Webcomic of Romance, Sarcasm, Math and Language.
   DIR Floodgap Gopher Fun and Games
        
       xkcd - A Webcomic - Focus Knob (1796)
        
       Image:
       focus_knob.png
        
       Maybe if I spin it back and forth really fast I can do some kind
       of pulse-width modulation.
        
       Comics reproduced from www.xkcd.com under license.
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