A 3D-Printed Joystick Turns Four WASD Keyboard Keys Into One Stick
DLC Joystick for Your Keyboard - Make:
KeyboaStick is a 3D-printed mechanism that replaces the W, A, S and D keycaps with parts linked to a small joystick. Tilting the stick presses the corresponding keyboard keys through articulated linkages.
Created by Korean maker FunOrNothing, the design uses mostly print-in-place joints. A Make: editor tested it by playing Sonic the Hedgehog 2 with the modified keyboard.
Four keyboard keys already control movement, but this adds a miniature joystick to press them instead. It's a controller built on top of another controller.