Arduino yun

The Arduino Yún is a microcontroller board based on the ATmega32u4 and the Atheros AR9331. The Atheros processor supports a Linux distribution based on OpenWrt named Linino OS. The board has built-in Ethernet and WiFi support, a USB-A port, micro-SD card slot, 20 digital input/output pins (7 of them can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a micro USB connection, an ICSP header, and 3 reset buttons.

Technical Specification

• Microcontroller ATmega32U4
• Operating Voltage 5V
• Input Voltage 5 V
• Digital I/O Pins 20
• PWM Output 7
• Analog I/O Pins 12
• DC Current per I/O Pin 40 mA on I/O Pins; 50 mA on 3,3 Pin
• Flash Memory 32 KB (of which 4 KB used by bootloader)
• SRAM 2.5 KB
• EEPROM 1 KB
• Clock Speed 16 MHz
• Ethernet 802.3 10/100Mbit/s
• WiFi 802.11b/g/n 2.4 GHz
• USB Type 2.0 Host
• Card Reader Micro-SD