

Austin Yang, an industrial designer current living in Edinburgh, Scotland, has created a working iPad typewriter keyboard that uses a hammer with a capacitive touch bumper to touch the iPad's on-screen keyboard.
Oddly, the physical keyboard doesn't map properly to the QWERTY keyboard on the iPad, most likely because of the mechanics of the typewriter that Yang has created. This is the likely reason for the very slow typing speed in the video below.
Article Link: One-Off Keyboard Prototype Turns iPad Into Typewriter