Illuminated Touchscreen Poster Frame with Subliminal Message!

Step 10 Combine the Layers

Take all three layers and the poster, and dry-fit them in the correct order. Try applying power to the middle and bottom layers to see the effect. When you're satisfied, set the top layer and poster aside for now.

The middle and bottom layers should be the same size. With electrician's tape, attach them together by folding tape around all the edges. You may also use the aluminum tape, but it's prone to damage.

Place the poster face-down on the top layer, and line it up so that an equal amount of plastic is visible on all sides. Tape it in place with masking tape. Flip the top piece over and set it on top of the middle and bottom layers. Try illuminating the bottom layer to help line up the poster. Tape all the layers together with masking tape.

In each corner of the poster, stick down a square of masking tape, and draw a crosshair about 5mm from each corner.

With all the layers temporarily held together, go to your drill press (or hand drill in a pinch) and *carefully* drill a hole in all four corners of the poster. The hole should go through all three layers of plastic and the poster's border.

Insert a screw in all of the holes, and secure with a nut. Don't overtighten the screw or you could crack the plastic.