fischertechnik light cap and covers

thingiverse

Fischertechnik has made several light bricks and coloured caps over the years. De oldest light bricks appeared in 1968 (type 31313, 35886, 35885) in standard grey colour en with an E5.5 fitting. In 1977 a second type of lightbrick followed (38217), also grey but with a click fitting for the bulb. This version has a slighty different thickness for the wall. From 1990 onwards the light bricks were made in black, red and yellow in yet another version. The click fitting is unchanged but the light cap now has two little hooks to click into a rectangular hole on the side. The new light cap is 12mm high and also has a raster to break the light into a broader pattern. So there are three different versions. I made a general routine in OpenScad that can create STL files for these three versions, including some extra functionality. For example, the height of the cap is variable, a hole at the front of variable diameter can be added and the little hooks are optional. The longer version can be used to house for example sensors or a laser. A raster at the top is also optional, but this needs printing with support with the front down. By modifying the parameters, fitting caps can be made for a variety of situations that either replace existing models or are special purpose. Use transparent PLA or PETG when printing the caps. I rarely use transparent PLA, hence the foto’s only show prints in green and white. I tried thicknesses of 0.5, 0.7 and 1.0mm and in my experience the 0.5mm is too fragile. Thicknesses of 0.7mm and 1mm work well. Have fun!