This custom-built golf club puts a new twist on POV (Persistance of Vision) systems. If you want to build your own, you’ll need a CUBLOC CB220, CUBLOC CB220 proto-board, 8 high-output blue LEDs, 1 empty semiconductor sleeve, 8 100 Ohm resistors, 9V battery, golf club, and a couple wires.” Full instructions here. Video after the jump.
As you can see, the letters will go backwards on the backswing and forwards on the forwardswing. Ben Hogan’s “Five Lessons” has a good picture of correct swing arc for a golf swing
[via HackedGadgets – zedomax]