Bristol Braille Technology is working on a more affordable replacement for traditional Braille reading machines. Under the hood is a Raspberry Pi running C and Python, controlling off-the-shelf motors and plastic gears to create the Braille text. Traditionally, Braille machines can cost £1000-2000. The BBT version is coming in at around £440. They hope to have a positive effect on declining rates of Braille literacy. More information and an interview with BBT founder Ed Rogers, is available over at arstechnica.