Moving into my new apartment, there were a few things I needed – a lampshade was one of them. Why buy one and settle for what’s available when you can build one? A non-cubic dice (popularised by role playing games such as Dungeons & Dragons) came to mind. These dice are synonymous to gaming culture and is a cool accessory for anyone, even if you don’t get the “I roll 20s” joke.
Step 1: Design
I decided to go with a 12-sided dice. This is a regular dodecahedron which consists of 12 regular pentagonal faces. The mathematical nature of these shapes makes it easy to scale this project up or down depending on your needs. [For the rest of this project I’ll just refer to the dodecahedron as the dice – it’s easier to type.]
To determine the size of the pentagons I measured from the base of my lightbulb to the distance I want the top face to be. I used this as the diameter of the dice’s inscribed circle, Di. This relates to the side length of each pentagon, L, by the following approximate formula: L=0.45*Di. From this a side length of 120mm was chosen.
The structure is built from bamboo skewers and covered with paper. No covering is added to the bottom pentagon as the lamp screws on there. Also, a lid was added to the top of the dice to enable access to the lamp.
For the base of the lampshade, the fitting of an old lamp shade was used.