DIY cinema

Hello. In this article I will tell you how I made a cinema trip! .. Yes, yes, exactly! As I have repeatedly mentioned in my previous publications, the company and I often go out for a week or two with tents to the forest. And what could be better than in the evening, by the fire, under a beer and a barbecue, to watch a good movie, or to watch the footage taken during the day on a large screen. So I came up with such an idea.

For its implementation I needed:
1. Screen.
2. The projector.
3. Columns.

The small screen, which when wound up easily fits in the trunk of a car, I did it myself. I spoke about this in my previous publication.

At Ali Express, I purchased a projector like this for a ridiculous amount (about $ 40):
Of course, it does not have high resolution and brightness, but it is quite capable of projecting a fairly high-quality image on a screen with a diagonal of more than a meter from a distance of several meters. It can be connected to various devices via an HDMI cable, it also has AV and VGA video inputs. I. which is especially nice, reads memory cards and flash drives through the built-in video player. And it is able to "swing" even a two-terabyte external hard drive via USB input. In addition, it is equipped with a remote control.
To easily install and position the projector, the following tripod was purchased on Ali-Express:
I also got a tripod for a very "humane" price - something, about ten dollars. It is rather weak, but its strength is more than enough for our lightweight projector. But it is stable and very well and easily adjustable:
Going "to nature", we always take a charged car battery. From it, for example, we feed the lighting of tents and charge the phones, since cars often have to leave far enough from the tent camp.
From him I decided to power our cinema. To charge the phones, even earlier, I purchased here such a splitter of a car outlet: I remade it a bit: cut off the cigarette lighter plug and replaced it with "crocodiles". Also, the most primitive protection against accidental polarity reversal, assembled on two diodes, was soldered inside.

The projector was designed to operate on a 220 Volt household network, so it was powered by the power supply that came with it. From the inscription on the block, I realized that the projector itself is powered by 12 volts, as we need. Since I planned to power it not from a 220 Volt network, I do not need this power supply. I soldered such a cord using the cigarette lighter plug cut off from the splitter:
Next, I took up the sound. The fact is that the built-in speaker of the projector sounds awful !!! Having removed the cover, I realized why - a thin tweeter is placed inside. And there is no place to place another - there is no free space there.

But there is a headphone jack, which means you can connect an external speaker system.

I decided to make it out of faulty computer speakers that had been lying in my basement for a long time. Opening them, I realized that (as expected) a power transformer burned out in them. I just threw it away:
Instead, he soldered a wire with a USB connector, taken from a faulty computer mouse: Since the splitter I mentioned above has a USB output (for charging phones), you can power the speaker amplifier from it. Which was confirmed by verification. The speakers connected to the projector via the headphone jack and powered by the USB jack give a good pleasant sound. What was particularly striking - it turns out that this primitive projector is capable of delivering stereo !!!

All. Our cinema is ready.
When assembled, it fits in a small box + screen. Happy viewing!