Hi I have an Acer c205 projector with 640x480 resolution does this Dex Station work?

It doesn't work, all laptops have only output (HDMI or VGA), no input, Dex must be connected to a monitor or TV.

What do you mean? Use the laptop as a screen? That depends on your laptop, whether it has an HDMI input. Otherwise, there is no way to connect a laptop to the Samsung DeX, which would also make very little sense.