Tech Xplore on MSN4 个月
A sensory pen that can read Braille could improve literacy among the visually impaired
A pen that can transform Braille into English text ... which includes a one-centimeter sensor with 19 channels programmed to ...
Hackaday1 年
Vectrex Light Pen Works Without A Raster
On most computers that used a raster-scanning TV display they simply picked up the flying dot on the screen as it passed the end of the pen, but the Vectrex with its display not scanning all of ...