An Arduino cable usually refers to the USB cable used to connect an Arduino board to a computer for programming and power. The type of cable depends on the specific Arduino model: Arduino UNO, Mega, and older boards → use a USB Type-B cable (the thick square-shaped printer cable). Arduino Nano (older versions) → use a Mini-USB cable. Arduino Nano (newer versions) and some ESP32 boards → use a Micro-USB cable. Latest Arduino boards (like Arduino Nano 33 IoT, ESP32-C3, or modern development boards) → often use a USB Type-C cable. The cable serves two purposes: Power Supply – provides 5V (or 3.3V in some boards) directly from the computer. Data Transfer – allows uploading of sketches (programs) and serial communication for debugging.