Some completed boxes

June 20th, 2015

The final version of some of the boxes came together after a lot of testing and iterations. Fitting the boards (microcontroller) or the oLED screen at the back of the box and working out the wiring are the most difficult parts.

OLED installed
Diorama 01: Diameter of Proton. The installation involves fixing the oLED to the back insert of the box, then the casing inside the box masks the screen’s edges. It is a simpler arrangement and quite neatly connecting jumper cables to a power extension cord via two screw-in connectors. The power extension cords pokes out of a small gap at the back of the box and ends with a 2.1mm female power jack. It requires 6V.
Microcontroller and wiring with conductive tape
Diorama 09: Radius of Earth, radius of moon, Earth-moon distance. This requires the LED on the bottom panel (pictured here to the left) to be connected to the arduino via conductive tape and wiring.

Back of Diorama 09
This is similar to Diorama 01 but for the extra connection to the LED at the bottom. (The back insert, looking a bit worse for wear, is recycled from early experiments.) It’s fiddly.

Diorama 10: Observable Universe
The completed Diorama 10: Observable Universe. An arduino is fixed to the back insert with wiring connecting to two LEDs that are installed on the casing, one diffused white 10mm LED, and one 4 pin RGB LED. These provide illumination for the image (Hubble’s capture of the observable universe) printed onto printable tracing paper. The arduino program feeds different values to the pins of  RGB LED, changing its colours through a defined spectrum. I will need to change the 10mm white LED connection to a PMW pin in order to dim its luminosity.

The completed box is very similar to Diorama 01. The front with the lens installed has four folded edges that tuck into the paper casing of the box, sealing the light from coming out from the sides.

Diorama 02, board, servo motor and LED
Diorama 02: wavelengths of the visible light spectrum is one of the more difficult set ups mainly due to the small scale and many different components that need to fit in together. Splitting white light into a wide rainbow also requires the distance that is not possible on this scale (although a thin rainbow can be seen). The microcontroller board and the servo motor are at the bottom with the 10,000 mcd white LED on the side connecting to the board via conductive tape and wires.

Diorama 2: board and motor installed under the prism.
A top cover (with a hole for the servo motor’s axel) provides a platform for the rotating prism.

The prism is still a bit wobbly on the platform, but I have since found a more secure arrangement (from making a bigger contraption for Slowing Down Time and for Hollis’s projection performances).

Diorama 04
This last completed box is Diorama 04: radius of light filament. It has an addition of a proximity sensor which triggers off the lights when a viewer comes close to the box.

All these completed boxes will need a final finessing (such as fixing the edges of the casing to the inside of the boxes). Some alterations (such as adjusting luminosity of lights) might also be needed. So six completed, four more to go!

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