After finishing the schematic, click the button.

For this guide, we will use the CH340G as it is the most common in current clones.

| Component | EAGLE Library | |-----------------|--------------------------------| | ATmega328P | microchip.lbr | | CH340G | ch340.lbr (download from GitHub) | | FT232RL | ftdi.lbr | | LM1117 | regul.lbr | | MIC5205 | micrel.lbr | | 16 MHz crystal | crystal.lbr | | Pin headers | pinhead.lbr |

This guide covers everything you need to know about finding, creating, and using an Arduino Nano schematic in Autodesk Eagle. 🔌 Understanding the Arduino Nano Pinout

This schematic represents a "Minimal Arduino." Once you have this, you have effectively reverse-engineered the core functionality of the Arduino Nano

DEVICE U1 ATmega328P Pinout: VCC VCC GND GND D0 RXD D1 TXD D2 D2 D3 D3 D4 D4 D5 D5 D6 D6 D7 D7 D8 D8 D9 D9 D10 D10 D11 D11 D12 D12 D13 D13 A0 A0 A1 A1 A2 A2 A3 A3 A4 A4 A5 A5 RESET RESET

⚠️ If you manufacture boards, ensure the license allows derivative use (Arduino’s CC BY-SA).