[Jay] hacked a Blu-Ray laser diode into a keychain enclosure. He found a heavy brass keychain light from Lowe’s and stuffed the diode and a larger battery inside. The existing batteries weren ...

While [Micah] want’s to use these Blu-ray drives for laser graffiti, there are a number of other slightly more useful reasons for the build. With a DVD drive, you can hold a red blood cell in ...

Related: Why you shouldn’t throw out those DVDs and Blu-rays] Blu-ray discs are read using a 405 nanometer laser diode that, while often referred to as “blue,” technically falls in a shorter ...