DIY Electronic Glow Stick with RGBW LEDs and 3D Printing
Idea 250,502
I’ve been experimenting with the idea of creating a reusable electronic glow stick — something brighter, customizable, and way cooler than your typical chemical version.
The Concept
Instead of a disposable glow stick, I’m designing a 3D-printed case using clear filament to diffuse light. Inside, I’ll place a custom PCB loaded with RGBW LEDs — that’s Red, Green, Blue, and White — giving full control over color blending and brightness.
A simple microcontroller will power the whole thing, driving animations like:
- Solid colors
- Rainbow cycling
- Pulse or breathing effects
- Custom patterns triggered by a button press
Why RGBW?
Most RGB setups lack pure white light — the white LED channel ensures a brighter, cleaner white and enhances pastel hues. It also makes the glow stick useful as an emergency light or soft lantern.
The Build Plan
- Design the PCB to fit neatly inside the case, with an onboard microcontroller (I’m considering an ATTiny or an ESP32 for bonus features like Bluetooth control).
- 3D print the shell using transparent or frosted filament to maximize light diffusion while protecting the electronics.
- Power it with a small rechargeable LiPo battery or standard AAAs.
- Add a single button to switch between modes — simple and user-friendly.
Future Ideas
- Bluetooth app control
- Sound-reactive modes (using a mic or audio input)
- Modular sections to extend the length of the glow stick
Why Make This?
Beyond being a fun weekend project, I see this as a sustainable alternative to single-use glow sticks, great for:
- Festivals & parties
- Camping
- Emergency kits
- Costumes and cosplay
