✏️ Project Patchouli: Build Your Own EMR Drawing Tablet from Scratch#
What if you could build your own drawing tablet compatible with commercial pens from Wacom and others? That’s exactly what Project Patchouli is about.
🔬 What Is It?#
An open-source hardware implementation of an electromagnetic resonance (EMR) drawing tablet, including:
- 📡 Coil array for detecting pen position
- 🔌 RF front end built with commercially available components
- 🧠 DSP algorithms for signal processing
- 📝 EMR protocol documentation for multiple vendors (Wacom, etc.)
🎯 Compatibility#
Compatible with most commercial pens from different manufacturers, offering an ultra-low-latency pen input experience for your custom hardware projects.
🌍 Truly Open-Source#
📜 Hardware: CERN-OHL-S (strongly reciprocal) 💻 Software: GPLv3 📖 Documentation: CC BY 4.0 💰 Funded by the NLnet Foundation NGI Zero Core Fund
💡 In Simple Terms#
A drawing tablet is normally a black box you buy at a store. Patchouli explains how EMR technology works from the inside and gives you everything to build your own: the circuit, firmware, and pen protocol documentation.
More information at the link 👇
