Overhead projectors were first brought into use in the 1960's and continue to be a mainstay of school classrooms and audio-video departments. The design for overhead projectors has been updated to use LCDs, which provides for a bright image without any heat. An LCD overhead projector is easy to make and will provide many years of dependable use.
Instructions
1. Measure the glass space of the used overhead projector. Get an LCD monitor which has the same dimensions as the space.
Unplug the LCD monitor and wait an hour. Remove the screws from the base of the LCD monitor. Remove the monitor's front from the back by inserting the plastic tool between the front and back casings. Put the back of the monitor aside after it has been separated from the front.
2. Remove the back plate from the front of the monitor so that it is no longer attached to the LCD screen. Remove the circuit boards and connectors attached to the LCD screen. Leave the circuit boards directly attached to the thick glass screen alone.
3. Increase the length of the LVDS cables connecting the circuit boards--which were removed from the front of the monitor to the monitor--by soldering FCC cables onto them to increase their length. Attach the connectors that were taken off from the front of the monitor back to the monitor.
4. Build a frame for the LCD screen from wood, and duct tape the infrared filter and the UV filter to one side of the frame. Duct tape the LCD screen over the filters to the frame. Put a thin layer of insulation foam strips around the edges of the LCD screen.
5. Place the LCD screen down onto the projector's glass and duct tape it into position. Attach the LCD circuits that were taken off of the projector to the side or the overhead projector using duct tape to hold them in place. Attach the extended LVDS cables to the main LVDS cable connector on the LCD panel. Turn on the LCD panel and use the overhead projector.
Tags: from front, overhead projector, from front monitor, front monitor, attached screen, back monitor