[IMPORTANT]

This design is outdated and possibly faulty, check out the Norbertduino V1.0 final for a tested and approved version.

Project introduction

This Arduino Uno R3 clone originated as an assignment for a CAD lesson, during a bachelor degree in applied electronics at the ITSCM. As I also organize electronics workshops at the Hackerspace Brussels, I wanted to use that opportunity to design a proper clone that could be sold during those workshops for the association's profit.

Project function

This clone faithfully reproduces the functionalities of the Arduino Uno R3, the main differences being that it uses a USB-C interface instead of the original's USB-B, and that the USB to UART translation layer is handled by a CH340G chip instead of the Atmega16U2-MU(R), avoiding the need for a second ICSP header. Power-wise, the Norbertduino implements the same power MUX logic as the original, switching off the USB's power supply when an external DC power input is plugged in, and also features a rearmable fuse rated for a hold current of 500mA protecting the USB power supply.