Laser Projector discussion/help?

Hello,

I saw this project a few months ago: Coding Laboratory: DIY Laser projector, i decided to try and make it.

Well the hardware side of things i have been able to construct. Ive got 6 mirrors, a Optointerrupter, a laser and pretty much everything.

The problem is from a software point of view im pretty much stumped. I know i need to pulse the laser at specific points to generate text but im not sure what calculations i should make and so on. I did try and pulse the laser at fixed intervals using the basic "blink" code to generate pixels, but the pixels dont seem to be aligned :~

Any suggestions, input, guidance as to how i should go about programming this?

The problem is from a software point of view im pretty much stumped

So are we.

(I can't see your pictures either)

The key is synchronization and repeatable timing.

What has to happen in order for a bright spot to appear at a specific point on the screen?