The Yun is a single board computer that combines an Arduino microcontroller with a Linux-based system, allowing for easy internet connectivity and the ability to run complex applications. It features built-in WiFi, supports various programming languages like Python, and is designed for projects that require both hardware control and network capabilities. It’s useful when a project needs Arduino-style sensor and actuator control alongside Linux networking, scripting, and file handling.

• Microcontroller: ATmega32U4 (for Arduino sketches and real-time I/O)
• Clock Speed: 16 MHz
• Operating Voltage: 5V
• Input Voltage: 5V (no onboard 5V regulator)
• 3.3V Power Out: up to 50 mA
• I/O Pin Out: up to 40 mA
• Digital I/O Pins: 20 (7 support PWM output)
• Analog Input Pins: 2
• Flash Memory: 32kB (4kB used by bootloader)
• SRAM: 2.5 kB
• EEPROM: 1 kB
• Built-in Wi‑Fi (802.11 b/g/n) and 10/100 Ethernet
• USB 2.0 host/device and microSD card slot
• Atheros AR9331 processor (MIPS, 400 MHz) running Linino, based on OpenWRT Linux
• 64 MB DDR2 RAM and 16 MB flash on the Linux processor
• Bridge library for Arduino sketches to communicate with Linux programs and network services
• Supports programming over USB or Wi‑Fi and optional PoE hardware

¹⁾

• Arduino.cc product page
• Schematic

If any referenced page no longer exists, try looking for its URL on http://archive.org.