Simple Web Cam Viewing for Mac OS X

Next month I'm going to do a little demo of adding memory for my local computer club. I have some old machines I can use for this, including an old laptop, so I'm all set with that.

But then I realized that we usually have too big a crowd to be scrunched around a table watching this. We do have a large screen TV.. how can I use that?

Well, my first thought was to use a little webcam and multicast it from QuickTime Broadcaster. I could do that and pick up the stream with QuickTime Player.. that works, but there's a delay. I don't want a delay if I'm talking about what I'm doing now.

The Preview window in QuickTime Broadcaster is just what I want - there's no delay - except that it's too small. Even on the large screen, it will just be too small for people to see. So that won't work.. or will it?

I forgot that I can scroll up my screen size just by holding Control and using a two finger scroll on the trackpad. If I position QTB so that the preview window is mid-screen, I can scroll that up to full screen and with the big screen mirroring my display, I have just what I want: full screen with no delay video of what I want to show them.

Simple, low tech (well, moderately low tech) and effective.