The total of all expenses is to throw a wire from the projector to the screen, but it turned out that there is no Trigger connector in my model of the projector … I’ll return to the screen a little later, but now I’ll note that the documentation didn’t say anything special about control methods, but the device itself had promising Trigger, RS-232 and IR connectors. But there was just one more problem. Great, so the projector can be handled, you have to deal with the connectors on the screen. I’m not a programmer or an electronics engineer. Trigger on the screen works correctly, I checked. Unfortunately, the lion’s share of topics is about how to add a motor to an existing screen. When the projector is turned off, instead of 12 volts, it becomes 0 and the screen folds back. But I prudently bought a motorized one! There were tips for lucky people like me. Besides the multimedia connectors, there was only RS-232. Therefore, I do not in any way claim the correctness and completeness of the solution, the black belt in the possession of a soldering iron, etc. But such a connector (even two!) Was in my receiver. We will be friends projector, screen and receiver. And if so, then we need to look for a way to automate all this. So, in a number of places it was mentioned that screens usually have a Trigger connector (and I have one https://jiji.ng/oredo/51-speakers/bluetooth, hurray!), The same connector is found on projectors. So let’s dismiss the Trigger connector for now… Actually, that’s why there will be a lot of letters, for those who are not interested – I will give the code and the diagram, you can immediately scroll through to them.
However, the screen unwinds to the end, which does not suit me, it is too low for my standard ceilings at 2.70. (I wrote about what I was guided by when choosing a solution under the spoiler, because not everyone may be interested) The principle of operation is elementary – 12V is supplied from Trigger Out (the projector should have this), the device with Trigger In (projector screen) reacts to this by unfolding. Googling how screens are usually automated. In the instructions for the projector, there was quite complete information about the control via COM. And in general, laziness, as you know, is the engine of progress.

Home Projector Screen Control Automation

Another article on Musk about small automation by Arduino, now it’s my turn to talk about my experience. In general, the process noticeably annoyed even me, and my wife generally growled. We needed a way to stop the screen when expanding to the required length. I had a task, in the process of solving it, I encountered a large number of rakes, so the essence of the article is to give information to newbies like me and push them to action. And, at the same time, warn about possible errors.