Conducting a training seminar without projector
Put your seminar material online, and just have people view it at the same time as you talk. It can be any easily readable format, like PDF file or simply series of web pages. If you are not sure that people will follow, just put large bold numbers on each page, and announce what page you're at when you change page. (A bit like kids' audio book!)

Either that, or hard copies of the material.