This project is made by Håkon 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 Håkon 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.

Blogsphere: TechnoratiFeedsterBloglines
Bookmark: Del.icio.usSpurlFurlSimpyBlinkDigg
RSS feed for comments on this post  |  TrackBack URI for this post

This entry was posted on Friday, January 12th, 2007 at 11:38 am and is filed under AVR Microcontrollers. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.