Which "smart" tint film to choose and how to manage it?

Question

Arduino

Hello.
You need a "smart" (the opacity of which can be adjusted) tinting film (a piece of 25x25 mm, if important).

It is not necessary to adjust the darkness, two modes are enough: ± 95% transparent, ± 20% transparent with a minimum of turbidity / fog.

I found this behavior in the welder's mask filter, "chameleon" which, but they use a glass sandwich and in no glass workshop could cut it to the right size (the sandwich either burst or fell apart).

On Ali I found such a kit (by searching for pdlc smart film):

There are versions with a black film, but, as I understand it, an ordinary car film is stupidly glued to it, and the cloudiness level in the off state is almost 95%, which is not suitable at all.

It is necessary exactly as according to the principle in a welder's mask, of course, not only with glass, but with a film, so that it can be easily cut into the desired size and does not take up much space in thickness.

I am also interested in how it can be controlled using the Arduino and is the electronics complicated there (in the welder's mask, 3 volts was enough)?

UPDT: The film that seems to be necessary in terms of behavior is called "SPD", but on Alishka it is not at all, and the rate of change is quite slow, and in the welding mask it is a fraction of a second ...

Answer 1

The welder's mask contains liquid crystals, so they are stuffed into a glass shell.
Electric tinting for cars on the same principle, they make special glass to order instead of native, it is she who is called SPD, which is why it is not on the alishka.
The only more or less affordable flexible option is electrochromic haze film.