/challenges-projects/project14/offtheshelf/b/blog/posts/arduino-nano-as-raspberry-pi-io-i2c-expander-part-2---the-i2c-bus---copter-rotor-control-via-i2c-joystick--Off the shelf Part 2 - Please see part 1 for the hardware overview - I'll sketch up a schematic later, its not complicated, mostly IO on I2C and their 3V power supplies.The DC brushless motor and driver is a touch more involved, but still pretty simpen-USTelligent Community 12