Make an Origami Circuit Board
Constructing an Origami Circuit Board
Authors: Qi Zhang (Ph.D. student) & Kening Zhu (Professor)
Affiliation: School of Creative Media, City University of Hong Kong (MEI Lab)
Date: June 24, 2026
Read Time: minutes
The Vision: Merging Art and Electronics
"What could you do if you could make a circuit trace by just bending a piece of paper?"
The researchers at the MEI Lab are exploring the intersection of digital craftsmanship and traditional arts. Their goal is to bridge the gap between modern technological capabilities and ancient handicrafts, creating a pedagogical opportunity to master both.
Project Objectives
- Integrate electrical conductors directly into papercraft.
- Eliminate the need for external molds.
- Enable the easy addition of
LEDsandmotorsto paper art. - Combine the fabrication of the object and the circuit into a single stage.
The Science of Conductive Textiles
The foundation of this project is a "nonwoven textile" that mimics the feel of paper but possesses unique electrical properties.
Material Composition
The substrate is a blend of synthetic and natural fibers, impregnated with a specific liquid metal alloy.
| Component | Material | Percentage |
|---|---|---|
| Fiber 1 | Polyester | |
| Fiber 2 | Cellulose | |
| Conductive Agent | Gallium-Indium | Liquid Metal |
| Solvent | Isopropanol | Liquid |
How it Works: The Oxide Barrier
Initially, the material is nonconductive. This is because the liquid metal exists as microscopic droplets, each encapsulated by an insulating oxide layer.
To create a circuit, one must break this barrier. Traditionally, this was done using shaped molds to apply pressure. However, the authors discovered that the mechanical stress from origami (folding) and kirigami (folding and cutting) is sufficient to crack the oxide shells. Once cracked, the droplets merge, creating a continuous conductive path.
Evolution of the Method
The researchers sought to improve upon existing "electrified paper" techniques.
Old Method: Applying separate flexible conductors, such as adhesive copper tape, onto the paper surface.
- Downside 1: Increased labor and complexity.
- Downside 2: High risk of creating open circuits as the tape struggles to conform to complex 3D shapes.
New Method: Using the inherent properties of the impregnated textile to create traces through geometry.
Fabrication Process
The team collaborated with the university's materials science and engineering department to refine the process:
def create_circuit(material):
# Step 1: Impregnate nonwoven textile with GaIn and Isopropanol
substrate = impregnate(material, "gallium-indium")
# Step 2: Use traditional papercraft techniques
trace = apply_pressure(substrate, method="folding_and_cutting")
# Step 3: Attach components
final_product = attach_components(trace, components=["LEDs", "Motors"], adhesive="masking_tape")
return final_product
Practical Applications
By utilizing these techniques, the team successfully powered various electronic components. They used simple masking tape to secure the hardware in place.
Examples of created objects include:
- ❄️ Snowflakes featuring integrated LEDs.
- ✈️ Aeroplanes and Helicopters with lighting and motorized propellers.
- 🐸 Frogs with illuminated eyes.
- 🎡 Windmills with rotating vanes.
Visual Gallery
