Automatic blind hooked up to existing projector screen using Arduino

I have a big mirror on the left wall, it makes the room brigther, but when watching a movie you want a dark room, and we could see reflections of the movie in it (very annoying) so i installed a grey/black blind i found in a DIY shop, it was a great fix. The mirror is embedded in the wall, and it is nice when not watching a movie, it expands the l

iving room. So i wanted to keep it, but still be able to watch a movie without seeing the reflections in the mirror.

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