SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

Hello folks, I am new here, but I have a serious problem and don't know what kind of sprinkler or nozzle to use to create a mist/water or fog screen to project images and video. I found several videos in youtube to what I need to create and I leave you all the links to see if you can help me create this handmade mist screen. Thanks!

Videos:

Great!, do you know any model or nozzle that could do that job?

Thanks! I read the webpage. It seems that that mechanisms creates a screen that goes from up to down when the fog lays down. What I need to produce is a system that goes from down to up. In the first video I posted, the person who handmade created the screen wrote down the materials, these are:

3/4 pipe and proper fittings to cap one end and connect the other to a valve
pvc blue hot glue
valve (sprinkler preferred)
pvc pipe cutters
a transformer that puts out 12v to turn the valve off and on

I am a newbie when talking technical terms such as valve and the electronic system, could you please explain me what does he means by "valve (sprinkler preferred) and a transformer that puts out 12v to turn the valve off and on" ? Perhaps an image? Thanks!