looking at how to mix light passing through acrylic and then through smaller grooves

 engraved speaker grill possibility for mp3 player concept

 rastered speaker grill

 layered acrylic seeing how the light passes through the different layers

 engraved lines looking at how they glow when light is shone through them

 working experiment of how light passes through different thickness plastic

 attempted experiment of light passing through different thickness plastic. Failed because no light passes through the black plastic

 this was with an axel made from a circular piece of acrylic that is pinned with a smaller piece of acrylic leaving the outer circle free to move

 I tried experimenting with making a circular switch with acrylic and without using an axel.  the circle is kept in the housing by making the plate beside it surround more than half the circle itself.

 interesting refraction pattern passing through the acrylic pieces