Arduino Uno

The Arduino Uno is the equivalent of a miniature computer without a keyboard or monitor. It's main usage is for prototyping circuits with a breadboard and the Arduino coding platform. It consists of 6 analog input pins, and 14 digital input/output pins, of which 6 can be used PWM inputs/outputs. It can be powered by a computer or 9-volt battery, and can power circuits with either 5 or 3.3 volts. It outputs and can accept up to 50 mA of direct current (DC) through the input/output or I/O pins. It has a 16 MHz clock speed and has 32 KB of storage, 0.5 KB of which contain the boot loader for the Arduino, and has 2 KB of SRAM.