I've been seeing students develop prototypes like these with arduinos and ultrasonic sensors for decades now, but does anyone know of tech like this that's in widespread production or actually used by the visually impaired?
@dang co.ug is a second level domain - it should be treated as a special website suffix by HN, like co.uk or github.io, so this story is considered as coming from ntv.co.ug, not just co.ug