The printer, dubbed Braigo (short for Braille with Lego), was created from the Lego Mindstorms EV3 set, which retails for $349. Banerjee also added $5-worth of additional materials, which means the finished product costs about $350. This makes Braigo much more affordable than other Braille printers, which can retail for more than $2,000, according to Banerjee.
Individual Foldscopes, as Dr Prakash dubs them, are printed on A4 sheets of paper (ideally polymer-coated for durability). A pattern of perforations on the sheet marks out the 'scope's components, which are colour-coded in a way intended to assist the user in the task of assembly—for the Foldscope has no written instructions to guide, or possibly frustrate, the user.
It's a remarkable claim considering that no one has yet come up with anything resembling actual "artificial gills." Codenamed "Triton," the mysterious concept comes in the form of a small mouthpiece, reminiscent of the "rebreather" James Bond uses in Thunderball (1965) and Die Another Day (2002). It is designed to mechanically capture the oxygen gas present in water and store it in a compressed air tank. As creator Jeabyun Yeon describes on his website, water is filtered using a pair of cylindrical shaped gills that house fine threads with "holes smaller than water molecules." A built-in micro compressor, powered by a quick-charging miniaturized battery, then condenses the oxygen, making it readily available as the wearer inhales.