Making a Laser Projector from a Hard Drive
hacks | hard drives | lasers | persistence of vision | projectors
There are many projectors that use a laser diode to display big images. But they generally have a very short range. Ben Makes Everything used a bright green laser to project images that can be seen from a much greater distance. His design relies on an old hard drive to create a persistence of vision illusion and can only display primitive text and numbers.
