1.The Arduino Uno is a microcontroller board based on the ATmega328 .
2."Uno" means one in Italian and is named to mark the upcoming release of Arduino 1.0.
3.It has 14 digital input/output pins , 6 analog inputs, a 16 MHz ceramic resonator, a USB connection, a power jack, an ICSP header, and a reset button.
4.It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.
5.The Uno differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. Instead,
6.it features the Atmega16U2Atmega8U2 up to version R2) programmed as a USB-to-serial converter.
7.This is your first step towards interfacing the lcd and keypad with your arduino.
Microcontroller : ATmeg328
Operating Voltage : 5V
Input Voltage : 7-12V
Digital I/O Pins : 14 (of which 6 provide PWM output)
Analog Input Pins : 6
DC Current : 40 mA
DC Current : 50 mA
Flash Memory : 32 KB
SRAM : 2 KB
EEPROM : 1 KB
Clock Speed : 16 MHz