hello everyone. i am really intrested in electronics so i am looking forward to buy arduino . so my question is which one to buy? i really like UNO because its cheap and most of projects that i saw here are using uno.

Eugbug11 months ago

There are several difference between the various Arduino boards. This Wikipedia page compares official and un-official Arduino systems:

This page on the Arduino website also gives a comparison of boards:

In general, boards have at least 14 digital pins which can be configured as input or output, 4 of which can be set up as PWM outputs. The minimum number of analog inputs is 6 and usually analog inputs can also double as digital inputs. On some boards, digital inputs can also be analog.

The Uno has 14 digital i/o pins, and six analog inputs.

The Due, Mega2560 and ADK boards are the "Big Daddies" with memory capacity up to 512k, 54 digital inputs and 16 analog inputs.

Another board which is quite good is the Leonardo which has 12 analog inputs and 20 digital input outputs. Remember on most boards, there is overlap between functions on pins and you can't necessarily have all these available inputs/outputs at the same time.

Check out my Arduino blog which has a sketch which runs on the Arduino and implements a command interpreter, plus accompanying software whic runs on a PC:

I got the UNO kit
start with uno its kind of the "standard", once you get comfy you can start playing with nano's pro's etc
The only real difference between the versions of Arduino is the number of I/Os on them. GO with whichever one you want and you'll be fine.
...then buy it....