An overhead projector is a physical device that you can use to show presentations. Some can be connected to computers and others are used to show manually created presentations made on clear plastic sheets, known as acetates.
A Powerpoint presentation is a slide show that has been created using Microsoft Powerpoint. It can be on any topic and shown to an audience. Some kind of projector can be connected to a computer to show the presentation to an audience.
Three examples of audio visual aids would be a movie or some type of video, a PowerPoint presentation, and a classic presentation using a presentation board or an overhead projector.
Three examples of audio visual aids would be a movie or some type of video, a PowerPoint presentation, and a classic presentation using a presentation board or an overhead projector.
You don't need a slide projector or an overhead projector.
Powerpoint replaced the need to prepare good speeches or college lectures.
The overhead projector was invented in the 1960's.
The Elmo HV series are great for presentations and have very strong colors.
If you are making a visual presentation with an overhead projector of some type, use Powerpoint as it handles visuals better than Word. If you are merely presenting a factual document or term paper or the like, use Word.
The projector can reach a pretty high temperature if left on for a while. So I think the main danger of an overhead projector is simply the heat. ;)
A Data Projector (referred to as Digital Projector) is a projector that gets its image from a Digital Source, such as VGA (computer), RCA (the most common A/V input), S-Video (another form of video input), and some others. These projectors are most commonly used along with DLP or LCD Technology.An Overhead Projector is an older style of projection, common in Education (Schools). These projectors are totally manual and require you to put a transparent image onto glass to project the image overhead.
My guess is that with LCD and DLP projector coming down in price, we will be seeing less and less of the overhead. When a video projector is used with an interactive whiteboard or tablet the possibilities are limitless.
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