MCP2221 HID Library

This is a library for interfacing with the HID features of the MCP2221 USB to UART and I2C/SMBus serial converter from Microchip. The converter includes 4 GPIO pins, 3x 10-bit ADCs, 1x 5-bit DAC and more. Microchip does provide a library for interfacing with the chip, however it is supplied as proprietary DLLs. This project aims to be an open-source and multi-platform alternative. This library also makes us ...

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Turn your Arduino Uno into an USB-HID-Mididevice

While building an Arduino Uno based Midi-Controller for Ableton Live, I came across the HIDUINO project ( ). It allows you to turn your Arduino Uno (or any other device using an AVR-USB chipset like the 8u2) into a driverless HID/Midi device. It's much more comfortable than using a software based serial to midi converter which has to run in the background all time. The only ...

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Arduino V-USB / HID 14 channel data logger

UPDATE:  Please see Addendum 2 at the end of this article for an Excel automatic logging implementation. There are several good articles on Instructables about building your own Arduino.  Depending on your horde of electrical parts, you may be able to build an Arduino clone for as little as $3.  I recently built two: one on a solderless breadboard and another that is like a USB-stick made on perfboard and m ...

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