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For some time, I had that a green background curtain in my workshop. I sometimes use it when I want to change the background of my videos, because is very easy to use that effect. As I had it till now is very ugly because it stands there in the corner. For now I was using it on some sliding rollers and when I don’t use it, I put it on the side. That’s ugly and it messes up the curtain. That’s why today I will go from that system to an automatic motorized curtain with rollers that will go up and down and can be controlled with my smartphone. Youc could buy such system from AliExpress if you want but I wanted a homemade version. And this is pretty cool, right? I’ll share with you as always, for free, the 3D printed parts, the schematic and the code on this post. So guys, let’s get started.

Ok sogo below and download all the 3D files that we need. They were all printed with PLA filament. Together with the 3D parts we need 3 bearings, the 608zz. WE need a threaded rod of 8mm, nuts, washers and some M3 screws. As for the electronics, we need a NEMA 17 stepper motor. The one I have is quite big so it should have enough power. To control it we need a driver. The cheap version would be those A4988 drivers. But those are very loud. For silent and smooth movement I always use the TMC2202 drivers. They only cost a few more dollars. To control the driver I will use an Arduino NANO and to receive data from the smartphone I will use a Bluetooth module, the HC-05 or 06. To supply everything I will use a 12V DC adaptor connected to a power jack. And that’s pretty much all we need so let’s start assembling this motorized curtain controller.”

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