Project Patchouli
Open-Source EMR Pen Tablet Hardware Implementation and Documentation
Patchouli is an open-source electro-magnetic drawing tablet hardware implementation, including a coil array, an RF front end built using commercially available parts, and digital signal processing algorithms. The design is compatible with most commercial pens from different vendors, offering an ultra-low-latency pen input experience for your customized hardware projects.
In addition, this project aims to provide a comprehensive documentation of the EMR technology, including the mechanism, circuit implementation, signal processing algorithms, and the pen protocol of different product lines from different vendors.
Project Code / Hardware Repository: GitLab
January 2024, The project started.
March 2024, the first small-scale hardware prototype was successfully tested.
January 2025, the documentation page was hosted on Read the Docs.
Maintainers
Project Lead: Yukidama
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