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.
2/6/13: New .stl files with smooth curves on Step 1.
Step 1: Materials and Tools
- Printed Pieces - The files are attached below. You need Smooth_Print_Block, which is everything but the barrel, and one of either Smooth_Print_OldSchool_Barrel or Smooth_Print_DarkKnight_Barrel, which are respectively the classic logo barrel and the current era logo barrel. The only difference between the two barrels is the logo. The file For Print.zip are the CATPart files of the two barrels and stacked parts.
- Super Glue or Model Glue
- 1 power LED - You can of course use any color LED you choose but white or yellow fit the theme best.
- SPDT Center Off Switch - I went with a toggle because that's what I had, and toggles are cool. The SPCO switch allows for a circuit that can switch between battery and mains power. If you only want one of these then use a SPST.
- 9 V Battery Clip
- 9 V Battery
- 4x #8-32 1/2" Screws
Power LED Driver Circuit- I use Dan's Constant Current Driver. You will need:
- 1x ~100k-Ohm 1/4 watt resistor
- 1x 1+ watt resistor - The value of this resistor is set by (.5/LED Current). Mine is 1 Ohm, 1 watt.
- 1x TO-220 NFET - A heat sink is optional but recommended if available.
- 1x TO-92 NPN transistor
- DC Wall Transformer (Optional) - Minimum current = LED current and must meet NFET or LED array voltage requirements.
- Prototype Board (Optional) - Can help organize your LED array or driver circuit.
- Soldering Equipment
- Q-tip or Small Brush - This helps apply glue to tough to reach surfaces.
- Fine Sandpaper
- File - Round for reaming holes and standard for general clean up
EDIT (2/6/13): The old .stl files have been replaced with new ones that have smoother curves. Now the barrel's and various radii will be smooth rather than the segmented prints you see in my pictures.