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While playing with a HeNe laser, some polarizers and quarter wave plates, and a photometer at work today, I noticed that the polarization of the output beam is not stable.   The intensity of light output of the beam is constant at 1.25mW, however the primary direction of polarization seems to...

I just took apart a Toshiba DVD/CDRW drive from a laptop.  I haven't been able to find the pinout for this diode.  It's rectangular with rounded edges and has 12(!) pins arranged as so                  x x x x x                x             o                  x x x x x where the o pin is...

Well, I guess if everyone will toast n diodes in their life, I can now look forward to only n-1 :). As a friend of mine says, you can't learn anything without breaking something.

I've been curious about this single AAA powered blu-ray flashlight mod: ledmuseum.candlepower.us/eighth/blu-ray.htm featured at the LED museum and available on ebay for ~$150. Does anyone know what kind of modifications have been made to the LED driver circuit to enable the blu-ray diode to run...