How to 3D Print a Gastly Humidifier (Free STL File)

Gastly Humidifier: LED-Lit Water Fog Overview

The Gastly Humidifier (8cm diameter) creates an enchanting mist effect using an ultrasonic atomizer, with LED lights illuminating the fog that disperses from Gastly’s body.

Safety Note

• Use only clean water to prevent bacterial spread.
• Operate in well-ventilated areas for health safety.

Key Components

• Ultrasonic Atomizer & Driver
• LED Strip (Blue/Purple hue)
• Cooling Fan
• Adjustable Resistor (for fog density control)
• 5V Power Source (Battery or Plug)
• Screws & Wiring

Functionality:

• The LED strip lights the fog, while the fan disperses it outward.
• The adjustable resistor regulates fan speed, controlling fog output.

Assembly Guide

3D Printing Gastly Humidifier & Setup

1. Print parts without support structures.
2. Install the atomizer in the lid, securing wires with screws (avoid overtightening).
3. Connect power and test functionality.
4. Attach the fanusing:4x M3×10 screws(for 7mm-thick fans)4x M3×15 screws (for 10mm-thick fans)
5. Wire components per the circuit diagram, routing cables through designated holes.
6. Assemble the holder and middle/back sections (4x M3×5 screws).

Key Tips

• LED Appearance: Shows blue with a purple tint on camera; darker backgrounds enhance visibility.
• Moisture Resistance: Only the LED strip and fan are moisture-proof. Shield the driver board and power source.
• Water Capacity: Internal tank lasts ~10 minutes. Condensation collects in a separate compartment—empty regularly.

Enhancements & Future Ideas

• Expand Design: Pair Gastly with a castle or base to hide components and increase water capacity.
• Aesthetics: Conceal wires/battery for a cleaner look (see reference images).

Upcoming: Improved designs with integrated structures—stay tuned!

Download all 3D-printable STL files for free below!

• back_A.stl,  back_B.stl
• eye_Left.stl,  eye_Right.stl,  face.stl 
• holder_A.stl,  holder_B.stl,  lid.stl
• middle.stl, tooth_Left.stl,  tooth_Right.stl

If you still have any uncertainties, you can read this article for explanation: 

Gastly - With Water Fog That Colorerd by the Light of LED