In a groundbreaking development, the open-source community has introduced a versatile and compact Linux-based system that fits within an SD card form factor. This innovative project, led by Lukas Henkel, aims to revolutionize wireless file transfer and custom firmware applications.
The core of this open-source WiFi SD card design is a System-in-Package (SiP) that integrates essential components, including:
- Power Management Integrated Circuit (PMIC)
- 4GB LPDDR4x memory
- Up to 128GB of storage
By adding a few external components such as a WiFi chip, antenna, and basic power management circuitry, it’s possible to build a fully functional Linux system within a tiny, flexible SD card frame.
This WiFi-enabled SD card can wirelessly transfer files on non-wireless devices, making it ideal for various niche applications. The project involves creating a 3D-printed SD card frame, which can be easily produced on an SLA printer, and using a simple four-layer flex PCB (Printed Circuit Board) as the carrier for the electronics.
WiFi-enabled SD cards have been available for some time, but this open-source version offers more hardware resources, allowing users to run custom firmware and explore new possibilities. With a user-friendly design and simplified electronics integration, this project could pave the way for innovative, wireless SD card applications.
The open-source WiFi SD card project represents a significant step forward in integrating advanced electronics into small, portable formats. Its compact size and powerful capabilities make it a promising tool for developers and tech enthusiasts looking to enhance their devices with wireless capabilities.
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