# MIT develops 3D-printed bifur-circuit blocks for reconfigurable smart devices

- Published: 2026-11-07 22:29 UTC
- Section: Machines & Making › Materials science
- Tags: MIT bifur circuits, mechanical metamaterials, reconfigurable electronics, shape shifting blocks, auxetic structures
- URL: https://realtech.media/news/rt-c645b0870eb1c8604df40f6a_mit_develops_3d/

**MIT researchers introduced modular mechanical metamaterial blocks that maintain electrical connectivity and shape-sensing across transformations.**

![MIT develops 3D-printed bifur-circuit blocks for reconfigurable smart devices](https://realtech.media/media/2026/11/df67c388efc4b479.jpg)
*NASA, Wikimedia Commons, Public domain*

Engineers at the Massachusetts Institute of Technology, collaborating with the University of Tokyo and the University of Michigan, have introduced 3D-printed building blocks called bifur-circuits. According to news.mit.edu, the modular mechanical metamaterials maintain continuous electrical connectivity across multiple shape reconfigurations without external wiring [1].

The components rely on auxetic metamaterials that expand laterally under tension and leverage mechanical bifurcation—a sudden shift in mechanical behavior once an applied load exceeds a critical threshold. In these modular units, bifurcation occurs when connected blocks rotate around a pivot point, exponentially multiplying the stable configurations available compared to traditional metamaterials with limited fixed states [1]. Connecting and rotating the units closes specific internal circuits, allowing the overall structure to intrinsically detect its geometry and transmit state data to an external display.

## Fabrication and mechanical endurance

To manufacture the blocks, the researchers developed a software simulation and design tool that directly outputs files for multimaterial 3D printers, fabricating the units in a single pass. A primary engineering constraint involved integrating a conductive material flexible enough to endure repeated displacement while retaining low electrical resistance [1]. In cyclic fatigue testing, the team compressed prototype assemblies more than 10,000 times without recording degradation in electrical conductivity.

## Functional interactive demonstrators

The research group fabricated several physical prototypes, including a game controller that executes specific applications based on its physical geometry, and an interactive chair that converts into a storage table or collapses flat for stowage [1]. The team reported potential implementations in frequency-reconfigurable communication antennas that operate without mechanical motors, shape-adapting robotic grippers, and assistive furniture designed to support body repositioning during rehabilitation. The findings will be presented at the ACM Symposium on User Interface Software and Technology.

## Sources

1. [news.mit.edu](https://news.mit.edu/2026/mit-engineers-create-system-for-building-shape-changing-smart-devices-0827)
2. [New Atlas](https://newatlas.com/electronics/bifur-circuit-transforming-electronics)

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Source: RealTech, realtech.media — https://realtech.media/news/rt-c645b0870eb1c8604df40f6a_mit_develops_3d/