The power to summon the Dark Knight in the palm of your hand! Ok, not really of course but it's still fun to pretend.
This is the assembly instructions and circuit construction for the Pocket Bat Signal Design
I posted previous to this. If you haven't seen the design walk-through here's a brief intro as to what this project is.
Designed for the 3D Design Contest (10/2012) it is a miniature (roughly 3"x3"x4") bat signal that can be 3D printed. It is designed in such a way that all the parts, excluding the circuit of course, can be acquired with two free prints from Instructables (if and when that program runs again) so that anyone can build their own, even if you don't own a 3D printer. It has a crank to change the angle of the barrel and is fully prepped for a LED circuit. More details can be found at the link above.
New .stl files with smooth curves on Step 1.