The?Arduino Uno R3 is a micro controller?board based on a removable, dual-inline-package (DIP) ATmega328 AVR micro controller.?It has 20 digital input/output pins (of which 6 can be used as PWM outputs and 6 can be used as analog inputs).
The Arduino Uno SMD is an adaptation of the Arduino Uno, yet utilizes a surface mount rendition of the Atmega328P rather than the through-opening form. This rendition was made because of a lack in inventory of the through-opening Atmega328P. The board depends on the ATmega328 (datasheet). It has 14 computerized input/yield pins (of which 6 can be utilized as PWM yields), 6 simple information sources, a 16 MHz gem oscillator, a USB association, a force jack, an ICSP header, and a reset button. It contains all that expected to help the microcontroller; essentially associate it to a PC with a USB link or force it with an AC-to-DC connector or battery to begin.
The Uno contrasts from all former sheets in that it doesn’t utilize the FTDI USB-to-chronic driver chip. All things being equal, it includes the Atmega8U2 customized as a USB-to-chronic converter.
“Uno” signifies one in Italian and is named to check the forthcoming arrival of Arduino 1.0. The Uno and form 1.0 will be the reference renditions of Arduino, pushing ahead. The Uno is the most recent in a progression of USB Arduino sheets, and the reference model for the Arduino stage; for an examination with past forms, see the file of Arduino sheets.