- LDD Free Download
- LEGO Traffic Light LDD file hosted on my website (mirror link on Google Drive)
- LEGO Traffic Light 3D illustration and parts list slideshow in HTML format hosted on my site
Although my final project differs slightly than the 3D file in LEGO Digital Designer, if you follow this guide accurately, you'll be able to get the base model down flat. In the LDD file of this project, if you click on build guide mode on the top right corner, the program will generate a step-by-step guide for building the structure from the bottom to the top. You can click anywhere on the screen to move the image around, and of course play with the camera angles to zoom in and out of stuff for detail. This may seem a bit frustrating, hence I'm recommending that only skilled LEGO builders try this idea, as they'll most likely use their preexisting judgement to make improvements and repairs as necessary. To a novice LEGO builder, this will be very, very tedious. By the way, unlike LDRAW
-- which is more sophisticated than LDD -- this program doesn't allow changing/re-ordering building steps: this means the program does its best to generate a linear build guide based on elevation, but often times you'll see random parts skipped or sometimes a piece left out and introduced later on -- notably in the first stage (green light) where bricks can appear at random spots -- such as the first few steps, which depict the green pieces floating in mid-air before going into the black Technic bricks. A skilled LEGO builder could spot an error like this and make judgmental changes when necessary; always make sure to go back and examine your work. This is a very tedious process that requires a lot of time, parts, and labor(and sometimes beer and Motörhead songs)
As you progress throughout the stages of this tall structure, you'll notice something rather odd about the internal colors: the inside walls have black bricks lined against the yellow walls: this is intentional, and was a last-minute addition to the design. Initially, the walls were originally 1x1 thick, and because of their bright color they would allow light to escape from the inside. In other words, the light from the spotlights would peek through the yellow walls -- hence I've reinforced them with a second layer of 1x1 bricks, only black, so make the traffic light appear totally opaque from the outside when lit up. Also in my final design of the project, I've lined the walls with metallic reflective duct tape.
The rear door has Technic bricks interlocking with stud-on-side 1x1 bricks; at first I assumed I would lots of these to keep the door shut properly, but upon actually building this, I realized the seal was too tight, and when pulled apart, some of the internal parts could come loose. Feel free to omit a few of these "buttons" that keep the door shut.
On the rear door, there are three ports to hold the LED lamps. The grey Technic pins are to be slid through the back, so that the lamp bases can connect. The four holes on the bottom of the door are where the pins to keep microchip controller in place shall rest, and above one of the holes is a blank square area (a missing brick): this is intentional -- because this is where the power cord will go through. Towards the top of the door you'll see another deliberately empty area, albeit reinforced with modified bricks. If you purchase the exact same toggle switch I provided a link to earlier, you should be able to slide the switch through the hole snugly. Make sure to calmly twist the threaded plastic part of the switch when placing it through the hole, so that it goes the whole way back.
If assembled properly, your structure will be sturdy, the door will open and close easily, the colored areas on the front will have enough transparent dots to make a circular pattern, and the rear door will have sufficient infrastructure for keeping electrical components in place. Try not to be so detailed-oriented when following the LEGO instructions: yes, I'm telling you to not pay too much attention to the LEGO build guide -- because chances are you're better off using your own keen sense of judgement and LEGO-engineering to construct a sturdy building -- with only using the 3D LEGO instructions as more of an "inspiration" or suggestion. What really matters is that your tower is of the proper size requirements, maintains necessary components for keeping the electrical parts intact, and above all, actually resembles a traffic signal! Feel free to deviate with the design as you please, and even feel free to make any size changes. You can make the traffic signal bigger than the model I've built, and you can play around with the physical design. My model provided in the 3D instructions serves more as a basic suggestion of making a standard sturdy structure for a LEGO traffic light, with the bare necessities for eventually adding electrical parts -- and not necessarily intended to be copied verbatim (although you're obviously free to build it exactly the same as mine if you choose)!However, the only parts I'm encouraging to copy verbatim are of course the ports for housing the electrical parts, because if you decide to use my exact electrical parts list (lamps, microchip, and all), you'll need certain areas of the LEGO structure built in precision to maintain the electronics!
In other words, details like the sloped LEGO pieces on the roof or the colors of the base aren't
mandatory -- but things like placing the Technic bricks in the right spot to have the microchip held firmly are
however mandatory (assuming you're using the same microchip as me)! If you plan on deviating with the electronic parts, like using your own schematic and circuits, then of course make sure to have the LEGO structure built to reflect your changes -- such as, for instance, making the bottom base larger and hollow for potentially housing an Arduino circuit.