how to use an overhead projector as a computer monitor - school overhead projector

It's great to have a projector to watch movies, but it may be expensive.
These instructions will show you how to make a projector (
Like you might have used in primary school)
Can be used with a computer.
The total investment will vary, but this is definitely possible, and it may be much less than buying a projector at retail price.
Because each projector and monitor is different, the price and design will also be different.
I will try to make the instructions more general.
I used the old Hitachi Display and the Apollo horizon overhead.
I managed to get everything for free and the same applies to you!
This project can take hours to an afternoon depending on your specific situation and the time you put in.
The required skills vary depending on the experience of the electronic device, depending on whether you can supply the original power supply to the display and whether the cooling fan needs to be welded to the power supply.
Keep in mind that the projector will stay away from HD, but this is an interesting project and most people will find the benefits greater than the cost. What you need :-
Projector-
If the backlight is broken, the size of the LCD display is as close as the projector lighting surface, which is fine.
But everything else is better. -
It's either a power supply for the display or two wires, it's better to be too long than too short.
If there is no power supply, you need a power supply with the same specifications. -Fan (
A small cooling fan, not a house fan)-
Soldering iron, welding
Screwdriver with flat head and Phillips head.
Depending on the display, you may need a small screwdriver. -
Some wood or any other material to build fixtures for electronic equipmentSaw. I used a"Saws-
But anyone should do the work. -
Drill bit and drill bit.
The size of the screws varies but will be small. -Countersink (optional)-
A box of screws, there may be several kinds according to the appropriate fixture --
Depending on how you protect the fan, you may need a router.
The display needs to be disassembled in order to get the screen.
Again, each monitor is different, but the plastic frame is likely to have a label that has to be pushed down to split the half.
Tip: I found that the flat screwdriver pry the frame works very well.
You can then keep it open by hand and push the label down using a screwdriver.
Warning: be careful, it's easier to slip and hit yourself with a screwdriver than you think.
The display is likely to have a metal cover that must be removed first.
As you can see in the photo, there is a box at the top of my monitor with all the "internal organs" on it "(
A pc board with all the functions required by the display)
It is necessary later.
In the picture, the connectors of the backlight are facing the bottom and need to be removed.
On the same picture, the ribbon cable on the left side needs to be disconnected, but it needs to be disconnected later.
Note: The ribbon cable on the left side is very important and very fragile.
Handle it carefully and don't bend too much.
There are many layers in the Monitor that have nothing to do with what we are doing.
After removing the internal organs, the first metal layer must be removed.
Note: Please take care of the ribbon cable again.
I have a stand for the ribbon cable on my monitor, but yours may not.
If they are there, then it is likely that they are fixed with double sided tape and can be pried up with a flat head screwdriver.
Again, please be careful with the ribbon cable.
There will be another secondary ribbon cable in the corner of the display, and in order to continue to remove the layer, the connection of these two cables must be disconnected.
Note: Smaller cables can be welded on one side, but it is enough to disconnect one side.
There are pictures showing different layers, but they can all be thrown away until you really get to the back of the glass you see in front.
I have a flexible lens and I'm not sure if this is standard, but maybe you can try it out.
The second ribbon cable may be relatively short, which limits the design of the fixture.
Like me, it's possible to use it as it is, but getting a longer cable will make things easier.
You need to measure the width and search the same cable online.
You don't need more than 6 inch things.
Note: it's best to delay the rest of the work until you get a new cable to help eliminate the error and make sure it comes together when it's done.
The fixture keeps the display above the top surface of the head and keeps the internal organs of the display and cooling fan.
As you can see, the fixture I made is very simple.
But if you value aesthetics more than I do, then your aesthetics is not the same as mine.
I used four scrap boards: two plywood and a few thin boards.
You shouldn't need to take more than a few inches to avoid serious heat problems on the top of your head, and the further you get from the top of your head, the lower the resolution you get.
I cut a hole for the fan with the router saw, but if you don't have a chance to install the fan, I believe there are other ways.
If your broadband cable is long enough, you can set the internal organs on the fixtures next to your head, but you still need to keep the monitor above its surface.
Tips for a good fixture :-
This may seem obvious, but keep in mind the balance of the fixture and you don't want it to turn over and destroy everything. -
Wood should not have enough electricity to cause problems.
But if you're worried, you can easily put a plastic barrier on the board. -
Think about the position of the control button in advance.
Where will this projector be used?
Where can you get the best and easiest access?
You should also remember the orientation of the display.
When facing the overhead lens (
You will be blind if the light is on)
, You should be able to read the text displayed on the display.
Note: Be sure to know the direction relative to the display itself, the circuit will be installed on the fixture.
There is not much room for error in the cable of the cable ribbon, so you need to be precise.
This step should not be too difficult because you already know where the parts will go from the construction fixture.
After the fixture is assembled, the last construction step is to put all the important parts into the fixture.
As described in the last step, the motherboard can be placed on both sides;
Please be careful to align the ribbon cable input.
I fixed everything with small screws, but the exact size depends on the thickness of the board you use.
Tip: For ease of transport, it is best not to permanently fix the fixture on top of your head.
Although it is not necessary, fixing the fixtures to the top of your head in some way will relax your mind.
I wish I could give some ideas but I think the solution will be relativesensitive.
Now that everything is put together, all that's left to do is make sure everything works. 1.
Make sure your computer is on. 2.
Set the fixture (with monitor)
On the projector3.
Connect VGA cable, power supply. 4.
Turn on the display, fan and overhead. 5.
Look at the projected image-
It's better to be in a dark room with a screen, but the less reflective white will work.
In the picture, the image is backward.
This is an example of a possible error which is a big one that needs to be re
Install parts.
After all this work, if your device looks like this and/or has passed your test, then you are done!
When everything is on, you should be able to connect your monitor to your computer and see the display on the projection screen or on the wall.
If you can't display the entire image on the wall, most new displays will allow you to change the screen scale.
This can be done by the control panel.
Although if you don't remember which buttons will do something, it will take some people to play.
Keep in mind that the images on the screen don't need to be large enough to get a good quality picture of the right size on the wall.
One suggestion not made here is to cut a small slot on the fixture where the screen is located.
This will allow the board to rest in it, so the image will not be blocked.
This is by no means a state-of-the-art projector, but for me it is well worth it (which was $0).
Please post any improvements you can make to the design or process and I look forward to seeing them.
Now that your new projector has been built, you can figure out how it works at home or in the office.
Thanks for reading.