From Mother Nature Network:

Using the Lego Mindstorms EV3 set, which retails for $349, and $5 of additional materials, 12-year-old Shubham Banerjee developed a Braille printer which could be an accessible solution for blind and disadvantaged people across the globe. His printer is much more affordable than other Braille printers, which can retail for more than $2,000. Banerjee plans to make the project open-source, by sharing the design online.

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