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Showing results for tags 'UV'.
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Hello! This was my Halloween MOC. It uses a SBrick to control 4 functions: - White light - Ultra-violet light - Fog - Minifigs rotation The white light uses a regular LEGO Power Functions Light pair. One LED is inside the pumpkin at front, the other one is bellow the floor, pointing up. The ultra-violet ("black") light uses 3 home made Power Functions UV pairs, with UV LEDs. I'm using a rectifier bridge and two 100 Ohm resistors to drive the LEDs, a circuit identical to LEGO PF Light pair. 2 pairs (4 LEDs) light 4 torches in the left and right walls. I put the LED inside a technic 1x1 brick with hole, behind the trans-neon-orange flame to hide it (black light sources are also blue light sources). Some UV passes trough, not much but I complete it with another pair (2 LEDs) bellow the floor, pointing up. There is a fifth torch in the back wall, without UV LED behind but still glowing a bit, like the spider in the left corner. The fog cames from an home made fog generator. It uses a kantal wire to heat glycerole/glyrecin, like the smoke generators used in in model trains as also most e-cigs. Has a silica wick that takes the glycerin from a small tank, enough for more than 30 minutes of work. The fog is not spreading allover the MOC as I intended. I might add a small fan later. Finally the minifigs rotation uses an old 9V micro-motor. No gears so it turns to fast :( Everything is powered from a LEGO Power Functions LiPo. You can see most of the electronics in this photo of the base while being assembled: -
So almost all of my misb sets are from the 1990 to 1995 period. I have heard about "oxygen sensitive white bricks" and yellowing of sets that are still misb, so I am worried that I won't be able to keep them immune indefinitely. So far none of them have shown any signs of yellowing, even in the oldest ones, do you think that if they were going to yellow, they would have by now? I keep most of them in a dehumidified basement that gets a little sunlight (not directly) and the others in a closest that also gets very little sunlight. Is it possible to keep them new indefinitely or will they eventually yellow regardless?
