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Projectors An Introduction

A projector is an output device that projects an image onto a large surface, such as a white screen or wall. It may be used as an alternative to a monitor or television when showing video or images to a large group of people. Projectors come in many shapes and sizes though they are commonly about a foot long and wide and a few inches tall.  They can be mounted on ceilings or maybe freestanding and portable. Ceiling-mounted projectors are typically larger, especially ones that project a long distance (such as 30 feet or more). These projectors are commonly found in classrooms, conference rooms, auditoriums, and places of worship. Portable projectors can be used wherever there is a bright room  or dark room.  Most projectors have multiple input sources, such as HDMI ports for newer equipment and VGA ports for older devices. Some projectors support Wi-Fi and Bluetooth as well. High-quality projectors used to cost thousands of dollars and the bulbs alone could cost more than a hundred d