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Circuit Scribe lets you draw circuits instantly! This is a rollerball pen filled with specially formulated conductive ink that dries instantly.
Open source, Arduino-compatible Bluetooth Low Energy (BLE) platform for use as a beacon, microcontroller, and HID device.
Open Source Modular Ergonomic Keyboard
Circuit Stickers are peel-and-stick electronics for crafting circuits. Use them to add electronics to any sticker-friendly surface: paper, fabric, plastic, the sky's the limit!