Lunar Crash Diorama – Part 3

With the lunar base completed,  the next step is creating a backdrop for the diorama. The backdrop photo of the earth and stars is printed on translucent vinyl and is backlit by a string of LEDs arranged in a zig-zag pattern. The LED string is the high density type; the LEDs are tightly spaced to help even out the illumination. The photo is held in place by a non-glare acrylic plate placed in front of it. 

Separating the LED string from the photo are several layers of diffusing materials, including bubble wrap, translucent foam sheet, and paper. I spent a fair amount of time experimenting with these materials so the photo would be evenly illuminated. The LEDs get quite hot so ventilation holes were drilled in the back of the display case to help disperse the heat. 

When I tested the lighting, I noticed that the front of the diorama (where the spaceship will be placed) was too dark. To fix this, I drilled a hole in the top of the display case and added a chip LED with broad dispersion to light up the moonscape.