Simple multimedia projector
Attention : as a matrix forming an image, you can take not only a small TV as in the article - an MP3 player that plays video, a cell phone, and especially an iPod with good resolution are also suitable. In general, there are many paths to success. And there is no need to solder the cable.
Well, any filmoscope, etc. will do as a slide projector.
For $75 I bought another masterpiece of Chinese friends - a Super TV with a pretty good 2.5" matrix, a standard resolution of 480*234 for such devices and a video input, which is very important:
It should be noted here that the size of the matrix was dictated by the size of the window for the slides in the projector, besides, Chinese TVs with a larger matrix still have the same resolution (the pixels are just larger), and you have to fence the entire package (lamp, optics, housing) for them. I don't think it's worth it.
At the bottom you can see the cable connector from the matrix:
We tear off the backlight with wires (on the right):
What remains is a matrix with a very short cable, about five centimeters, which is completely unacceptable for our purposes, and Chinese engineering has gone so deep that there are 28 contacts located on one and a half centimeters of cable width:
But there is nothing to do - you still need to lengthen it. Attention! Take on this procedure only if you are really confident in your abilities, otherwise it is better to entrust this to a more experienced friend!
Armed with a Japanese 25W soldering iron, low-temperature solder, a magnifying glass and MGTF 0.03 wire, I taped the cable to the table, placed a piece of plastic, and after 2 hours of torment I got the following:
Then I filled it all with a glue gun, rang out all 28 contacts on the board with a tester (the points were on both sides of the board) and soldered to them:
The result is an external matrix on a 20cm cable (the inscription SUPER is the image on the display in the absence of an input signal):
I got the decommissioned Svityaz-Avto slide projector for free:
Inside it already has everything you need - trans, cooling and optics, consisting of a 24V 150W halogen lamp, a reflector, a triplet of lenses, a UV filter made of special glass and a triplet lens (not in the photo):
I inserted the matrix into the slide window and added it just in case. cooling in the form of a cooler for P4 and pipes, although with a native lamp, apparently a standard one would be enough, becauseIt turned out that the temperature on the matrix does not exceed 40 degrees (air is successfully sucked in through the slot for the slides just opposite the matrix). I threw out all the now unnecessary mechanics:
The finished projector looks like this:
I threw out the original fan and installed a diametrical turbine. I hid the power supplies for the TV and fans in the case. The device stopped making noise and took on this appearance:
Considering the level of all other components, the screen was also made very budget, but displays brighter than my old matte Projecta for $200, sold a year ago. Because A raid on stores in search of powdered silver did not bring any positive results, I simply painted a piece of cardboard with ABRO “chrome” aerosol, and painted the frame matte black. The result is a panel with a diagonal of 125 cm (50"):
Comparison with a TV standing next to it (20" Sony Trinitron):
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