just wonder... by using arduino lcd shield with keypad... which as a topping for the arduino board.. i notice that it already used all available slot on the board(i/p o/p)... so i wonder is there are any way that i can like... built an external i/p o/p? or... hmm expand it into a big board 
I doubt every single pin on the Arduino expansion headers is used by that shield. You should look at the schematics to see which pins are used and for what function. You need that information to correctly configure the liquid crystal library, by the way.
HTH
Hi, the 4bit lcd shield only uses about 10 Arduino pins and yes you cannot stack anything on top of it, im considering making an intermediate board to stack on the Aduino and give 2 sets of headers meaning you can stack 2 sets of shields side by side, im also thinking about making an Arduino board with two sets of headers side by side
im considering making an intermediate board to stack on the Aduino and give 2 sets of headers meaning you can stack 2 sets of shields side by side
You mean like this?
http://www.liquidware.com/shop/show/DWX/DoubleWide+ExtenderShield
Jon
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