I am a newbie so I'm not sure this is the right place for my question and I would really appreciate some guidance or tips or pointers with the question I have so I can get by this stumbling block with confidence. I was playing around with microchip PIC's and picbasic for the last 7 years or more but I notice there is a much nicer set of tutorials and links and so forth and I'm hoping the same is true for the forum :-)
I have just purchased an Arduino Uno as a hobby device and have covered the first tutroial explaining how to blink an LED. My next mission is to connect a 3x4 or 4x4 matrix keypad for input. I have gone through the tutorial in the Arduino playground and it's working great :) Here is my problem or question (the one I can't seem to find an example of): I would like to grab several keys, that I press for example 1 392 and end with a # then print that number on a screen or LCD and store that value in a variable for use later on in the program. So I guess it's like a calculator where you type in the the number and that stays on screen until you choose what to do with it (the operation may be like X or + or - or /)
So in a nutshell I would like to know how you combine multiple numbers that are entered in via the keypad, into one number and then convert it to binary.
Is there some kind soul or souls who could shed some light here please.