This project is made by HÃ¥kon A. Hjortland. The idea is pretty simple and original. He used rotating mirrors to create a video projection. 16 differently tilted mirrors were fixed on a round drum that spins at about 20 – 30 s-1. Each mirror draw a separate line on a screen. For each pixel, the laser is turned on or off. Resolution isn’t very bit -just 16 pixels at each line. But it gives a nice impression.
As Author states calibration is a hardest part of project. Especially Y direction of mirrors, that each mirror draw a separate line on screen. X calibration is done by software.
The fun part is a Firmware. Program is written in AVR-GCC language. What it does is redraws a frame every 4 or 5 frames.
Watch a video of this project: DivX video: projector.avi (3.5 MiB)
Source code:
projector.c
video_alf.h
test_pattern.h
Additional sources representing an idea:
Building a Laser Projector (PDF) – By Alex Hornstein
TinyProjector – Eight lasers and mirror
Original source by HÃ¥kon A. Hjortland.
Related
To project your photo from a digital camera, first add your photo to your computer. A wireless webcam could also take a great picture. Transfer the photo file to a laser video projector according to the user guide. In no matter than minutes, you’ll have your very own home theater.
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