Rumi Sword-KPop Demon Hunters - Parts - Assemble

Aug 21, 2026

Rumi Sword from KPop Demon Hunters is a cosplay LED prop built around Adafruit’s TPS61169 constant-current boost converter and two pink flexible LED “nOOds” that light both blade and handle. The guide details required components, electrical wiring reference via a circuit diagram, and practical assembly steps such as pressing fit parts, mounting a slide switch and TPS board, connecting the nOOds and LiPo battery, and joining blade and handle halves. It emphasizes reinforcement of 3D printed sections with steel machine screws for strength and durability.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages16

Reading Time40 min

AccessFree to download

Overview

Parts

Circuit Diagram

nOOd gap close

Assemble

Rumi Sword-KPop Demon Hunters Created by Ruiz Brothers [https://learn.adafruit.com/rumi-sword](https://learn.adafruit.com/rumi-sword) Last updated on 2025-11-03 09:51:37 AM EST ©Adafruit Industries Page 1 of 16 Table of Contents Overview 3 | • Parts
• 2x of Noods
Circuit Diagram | 7 | | --- | --- | | • Adafruit Library for Fritzing
• nOOd gap close
3D Print | 8 | | • 3D Printed Parts
• Filament Change Layers
Assemble | 11 | • Join blade parts • Press fit nOOd • Mount Slide Switch • Mount TPS board • Attach blade to hilt • Hilt slit • Connect nOOd • Mount lipo battery • Connect battery • Join handle and blade halves ©Adafruit Industries Page 2 of 16 Overview Seal the Honmoon with Rumi's sword from KPop Demon Hunters! Powered by the Adafruit TPS61169 Constant Current Boost Converter for LEDs! Two Pink LED nOOds illuminate the blade and handle to create a bright cosplay prop! We designed the sword with steel machinescrews to reinforce the 3D printed parts so it's strong and durable, just like the demon hunters. Noods LEDs are often seen in 'Edison-like'LED bulbs, shaped into hearts or stars or just wound around to create a fun or warm lighting effect. They're made of dozens of LED diodes that are bonded together on an ultra flexible metal backing, then coated in colorful silicone for protection. The printed sword houses the TPS LED Booster board with a slide switch to power on. ©Adafruit Industries Page 3 of 16 Parts Adafruit TPS61169 Constant Current Boost Converter for LEDs The Adafruit Constant Current Boost Converter for LEDs makes driving LEDs easy, whether they're in series or parallel with a chip that can generate up to... [https://www.adafruit.com/product/6354](https://www.adafruit.com/product/6354) 2x of Noods nOOds-Flexible LED Filament-3V 300mm long-Pink Our favorite food when hacking on code or electronics is a hot bowl of noodlesand around NYC these are often called'noods'! What we've got here are flexible LED [https://www.adafruit.com/product/5510](https://www.adafruit.com/product/5510) ©Adafruit Industries Page 4 of 16 Breadboard-friendly SPDT Slide Switch These nice switches are perfect for use with breadboard and perfboard projects. They have 0.1" spacing and snap in nicely into a solderless breadboard. They're easy to switch... [https://www.adafruit.com/product/805](https://www.adafruit.com/product/805) [Lithium Ion Cylindrical Battery-3.7v](Lithium Ion Cylindrical Battery-3.7v)[ ](Lithium Ion Cylindrical Battery-3.7v)2200mAh Need a big battery for your project? This lithium-ion battery contains a 2200mAhand a protection circuit that provides over-voltage, under-voltage, and overcurrent protection. Yet, ... [https://www.adafruit.com/product/1781](https://www.adafruit.com/product/1781) [Adafruit Micro-Lipo Charger for LiPoly Batt](Adafruit Micro-Lipo Charger for LiPoly Batt)[ ](Adafruit Micro-Lipo Charger for LiPoly Batt)with USB Type C Jack Oh so handy, this little lipo charger is so small and easy to use you can keep it on your desk or mount it easily into any project! Simply plug it via any USB C cable into a USB port... [https://www.adafruit.com/product/4410](https://www.adafruit.com/product/4410) JST PH 2-Pin Cable – Male Header 200mm For a really long time we assumed that the JST PH didn't have a free-hanging male header version. But then we found this JST-PH 2-pin Male Cable, and we were [https://www.adafruit.com/product/3814](https://www.adafruit.com/product/3814) ©Adafruit Industries Page 5 of 16 Silicone Cover Stranded-Core Wire-50ft 30AWG White Silicone-sheathing wire is super-flexible and [https://www.adafruit.com/product/3169](https://www.adafruit.com/product/3169) 1 x Gold Polymaker PLA PRO Gold Polymaker PLA PRO [https://www.amazon.com/dp/](https://www.amazon.com/dp/)[ ](https://www.amazon.com/dp/)B0B8HY63WY | 1 x AMOLEN Blue Glow PLA
AMOLEN Blue Glow PLA | [http

FAQs

What powers the LED blade and handle in the Rumi Sword project?

The project uses an Adafruit TPS61169 constant-current boost converter for LEDs, controlled through a slide switch and TPS board.

What are “nOOds” in this build?

“nOOds” are flexible LED filament strips made from many LED diodes bonded to an ultra-flexible metal backing and coated in protective silicone.

What does the assembly process include at a high level?

It includes joining and reinforcing 3D printed parts, pressing fit components, mounting the slide switch and TPS board, connecting the nOOds and LiPo battery, and attaching the blade to the hilt.

Aug 21, 2026

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