Arc reactor door knob

thingiverse

I created a new cupboard handle just a few days ago and wasn't thrilled with the door knobs. So I had an idea to make something cool, inspired by Iron Man's arc reactor - this is what I came up with. It's not 100% like the original reactor but I had to focus on stability. You'll need: The printed parts A screw A mini switch Some cables A knob battery CR2032 3x LED (blue) Here's how to make it: 1. Print all components in black or any color you prefer, except for the diffuser, which needs to be printed in white, translucent, or glow-in-the-dark filament. 2. Glue the diffuser into the cap and attach the coil on top of the cap. 3. Wrap some copper cable around the holes in the front- and back-part of the battery holder. 4. Insert the battery. 5. Connect the battery to the LEDs, making sure to use the switch and being mindful of the polarity of the LEDs! 6. If everything works as expected (the LEDs light up), insert the battery and LEDs into the base part. Close it by screwing the cap onto the base part. I secured the switch with some PLA from a 3D pen, but glue would work just as well. 7. Use the screw to attach the knob to your cupboard door or wherever you'd like! 8. You can easily replace the battery by opening up the knob (remember, it's screwed together!).