The Ray Gun

3D Printed Parts
There are 10 pieces to the ray gun. This is a great print if you're really ambitious about 3D Printing. The raygun-neck.stl, raygun-handle-top.stl, and raygun-handle-btm.stl parts require support material to print properly.

Once you have them all printed out, test fit them to see if the tolerance allow for a snap fit. If things are too tight, you can always try sanding down areas to allow assembly. Below is a list of parts that fit to one another.

  • raygun-cap.stl > raygun-body.stl
  • raygun-neck.stl > raygun-body.stl
  • raygun-cone.stl > raygun-neck.stl
  • raygun-sensor.stl > raygun-cone.stl
  • raygun-ring.stl > raygun-cone.stl
  • raygun-handle-top.stl > raygun-handle-btm.stl
  • raygun-handle-lid.stl > raygun-handle-top.stl
  • raygun-handle-top.stl + raygun-handle-btm.stl > raygun-body.stl
  • raygun-diffuser.stl > raygun-ring.stl
MLX90614
The temperature sensor is inserted into the raygun-sensor.stl part with the orientation aligning up with the slit opening for the sensors nub. Use a long thin screw driver to gently press against the sensor, securing into place.
GEMMA
The micro-controller snaps to the inside of the raygun-cap.stl with the USB port facing the large opening for reprogramming without disassembly. The slide switch adapter tightly fits into the opening of the raygun-cap.stl, just above the GEMMA.
NeoPixel Ring
The wiring needs to be long enough to run from the raygun-cap.stl to the raygun-body.stl, strung through the raygun-neck.stl and strung through the small hole of the raygun-ring.stl. The wiring should be exposed on the raygun-cone.stl part.
Assembling the Handle
The raygun-handle-top.stl and raygun-handle-btm.stl pieces snap fit together. Both parts have 2mm holes for small screws that will mount the two parts to the raygun-body.stl
3X AAA Battery Holder
The two handle parts and the raygun-body.stl have a large hole, this allows the battery JST wire to run through the parts and is connected to the slide switch adapter that is mounted to the raygun-cap.stl. The raygun-handle-lid.stl part is secured to the raygun-handle-top.stl with 2 small screws.
Ray Gun
The fully assembled model is a challenging project but definitely reproducible. Each piece is hollow and optimized for sturdiness.
This guide was first published on Apr 10, 2014. It was last updated on Apr 10, 2014. This page (The Ray Gun) was last updated on Feb 11, 2020.