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Arduino Laser Projector
A laser projector creates a light show that seems to be coming from dozens of laser beams. It only needs a single laser beam to create the effect because the beam is diffracted as it emerges from the projector.
This project shows how to build a laser projector using an Arduino, a heptagon pillbox, a cooler fan and a laser pointer. Making your own laser projector requires a few parts from a laser supply house and some skill and knowledge of electronics.
The creative use of a heptagonal pillbox for a polygon greatly reduces the overall cost and complexity of the finished device. The projector can only able to display dot matrix messages.
Click here to see the rest of the project.