Multimedia projector

I think many people would like to have a home theater in their home. If you've already thought about this, you've probably come across the question - how to make a big screen? If you buy a TV, it will cost a pretty penny, and even a large TV with a diagonal of one and a half meters will not create the impression of a cinema. Another option is to buy a projector. Of course, the idea is also very expensive, plus you can hardly find the components, and if you do find them, they are expensive. I mean the projector lamp, and it doesn’t last long.

But if you use a real projector at home, you can create a real cinema hall.

There is a third way that I took - to make a projector myself. This is not relevant to the article, but I will still tell you why I decided to take this step. I had a dream in my head for several years to build my own home theater. And then a girl appeared in my life... And you can’t even imagine what a desire I had to invite her to watch a movie in the cinema. In our run-down town, apart from numerous pubs, there are practically no attractions, and we’ve only heard about cinemas here. So I decided to build my own.

In general, whatever your goals, let's get started.

Parts and components

Having rummaged through the Internet, I ordered the following for delivery by mail: two fresnel lenses with focal lengths of 220 mm and 317 mm, a lens of 80 mm / 1: 4 / FR = 320, and the heart of the projector - an LCD matrix with a diagonal of 15 mm and a resolution of 1024x768.

I ordered a body from a sawmill and designed it myself, so during assembly a bunch of shortcomings were revealed.

Light. Powerful Light-emitting diode and the driver for it. Power LED 100 W. This was all sent straight from China.

Projector assembly

First, let's disassemble the monitor.

And very carefully remove the matrix itself.

There is an anti-reflective film on the front of the matrix. You can, of course, leave it, but I preferred to remove it, thereby improving the image quality.

It is removed like this: covered with wet napkins or a towel and left for 10 - 12 hours. Then carefully removed.

Checking functionality after removing the anti-glare.

Everything is working. Now let's start assembling the case.

We adjust the rims on which the matrix and fresnel lenses will be attached.

We attach the lenses with ordinary self-tapping screws, with the ribbed side of the lens facing inward.

Yes, I also forgot to mention about buying a radiator with a cooler from a computer. On this radiator I installed Light-emitting diode, having previously lubricated the surfaces with heat-conducting paste for better contact. For reference: powerful Light-emitting diode 100 W is equivalent in luminous intensity to a 400 W metal halide lamp.

We insert and attach the driver and radiator to the case.

We check and are a little disappointed: our Chinese friends sent a defective one Light-emitting diode - one section does not light up.... Well, oh well.... Plus, the driver is heating up, and I decided to reinstall it.

We take out our box of lenses and insert the matrix into the middle.The matrix in the image should be rotated 180 degrees relative to the top and bottom and inverted. In other words, where there is up, there must be down, and where there is a left edge, there must be a right. This is done so that everything is projected correctly, since the lenses flip the entire image.

We fix it. lens with a focal length of 220 mm to the LED.

We turn it on and experimentally find a place to mount our box from the wrappings, so that the light is distributed evenly across the screen.

Here I got a good picture when projected onto a wall with wallpaper. diagonal 2.5 meters.

Then there are continuous adjustments, removing wires, bringing it to mind. As a result, this is what happened.

The result of the projector is when projected onto an ordinary sheet.

Especially for - www.home.washerhouse.com There was a design like this before.

It took me two months and less than 10 thousand rubles to build everything. In my opinion it is worthy. Now we still need to make a screen, but more on that later....

To my deep regret, after finishing the construction of the projector, I was left without a girlfriend, this is not because it took me so long to build it, but it just happened that way...

In any case, the thing is necessary - it will come in handy on the farm).

I hope you liked my life-philosophical-technical article. Thank you for your attention - good luck!