This semaphore was designed for my "Euroreprap Railroad System" collection.
It is a working machine! It can display signals like:
To learn about the assembly please take a look at this PDF instruction:
No support is needed during printing
Printers with small bed sizes will do fine (for bed areas below 15x15 cm please contact me first to obtain adequate files set on order)
No special tools are needed during assembly (I use metal nail file for finishing places where excessive material remained)
The model's dimensions after assembly are: 84x92x283 mm (3.3x3.62x11.14 in)