The Nano runs on an ATmega328 with a clock speed ... differences in size and microcontroller, the Arduino Nano and Micro share some similar pinout configurations. They both have two GND pins ...

Note: Pin D9 on the Arduino is not the same pin 9 on the ATmega328 IC. Pin 15 on the IC is actually the pin for Digital Pin 9 (D9) on the Arduino. If you want to see the pinout for the ATmega328 IC, ...

Adding USB functionality to your Arduino projects used to be a pain, but thankfully, the V-USB project came along and gave your ATMEGA328 the ability to control the USB lines directly and mimic ...