According to the source review from Digital Trends Computing, the Muxcard is an innovative open-source device that packs a working microcomputer, wireless connectivity, NFC, sensors, and an E Ink display into a body as thin as a credit card. This experimental project highlights significant advances in ultra-portable electronics and flexible components, aiming for seamless integration into everyday objects.
- Ultra-thin computer with E Ink display and wireless features
- Designed as an open-source hardware project for developer use
- Suitable for secure IDs, digital business cards, and ambient computing
Product angle
The source review reports that the Muxcard is a pioneering credit card-sized computer, merging a fully functional microcontroller with low-power E Ink technology alongside NFC, Bluetooth, and Wi-Fi. The project emphasizes ultra-portability combined with durability, using flexible PCBs and clever component layouts to survive bending typical in wallets. It represents a notable step into ambient computing where devices become nearly invisible as they integrate with everyday objects.
Although experimental, the Muxcard documents solutions to challenges such as limited battery capacity and bulky wiring by employing a flexible 1.54-inch E Ink display and hand-soldered connections. Its open-source status encourages hobbyists and developers to explore different use cases and push innovation in minimalist computing platforms, particularly emphasizing low power consumption and ambient use scenarios.
Best for / avoid if
The Muxcard is best for hardware enthusiasts, makers, and developers interested in ultra-compact computing and exploring new categories of wearable and ambient devices. Its low-power E Ink display makes it suitable for applications like digital business cards, secure identification, two-factor authentication, event access passes, or smart home controls. This form factor appeals to users who value portability and discreet tech integration rather than mainstream consumer features.
Conversely, it is not suited for general consumers seeking a finished commercial product, as the Muxcard remains an experimental open-source project requiring DIY assembly and technical skills. Those needing powerful computing, larger displays, or extended battery life will find the device’s limited capacity and minimalist interface insufficient for their needs.
Pricing and alternatives to check
As an open-source hardware project, the Muxcard is currently available through shared hardware files and firmware on GitHub for non-commercial use, implying no direct purchase price but potential build costs for components. The project’s focus is on experimental and educational value rather than commercial sales, encouraging community engagement to replicate or enhance the concept.
Potential buyers or developers might also explore alternatives in the ultra-portable computing space, including other microcontroller-based cards or devices offering Bluetooth and NFC with varied display technologies. Comparing the Muxcard to more mature wearable digital ID solutions or commercial smart cards will help assess trade-offs in durability, battery life, and development complexity.