user2901: first of all, I'm kindly apologizing for asking such stupid questions, but as my electronic-knowledge is dramatically limited, you are my only hope to get my problem solved.
I'm pretty new to Arduino and my plans are to stack a lcd shield on a motor shield, which is stacked on the Arduino. 
My setup would be the following:

Arduino MEGA2560
LCD-Shield http://www.sainsmart.com/arduino/arduino-shields/lcd-shields/sainsmart-1602-lcd-keypad-shield-for-arduino-duemilanove-uno-mega2560-mega1280.html
Motor-Shield http://www.sainsmart.com/arduino/arduino-shields/motor-shields/sainsmart-l293d-motor-drive-shield-for-arduino-duemilanove-mega-uno-r3-avr-atmel.html

My target is to enter specific values trough the LCD-shield (with its buttons) and to control a stepper-motor related to those.
Now to my question: Can I realize my project with the mentioned parts and are the two shields stackable (with head extentions on the motor-shield) without creating interferences?
Thank you very much for your time and answers in advance.
Best regards,
irie

user337: No, it doesn't look like it.
The LCD board uses digital pins 4-10 and analog 0
The motor board uses digital pins 3-12 if all motors are used.
If you need to stack boards look for boards that use I2C since they can share a single data bus.

2901: <p>first of all, I'm kindly apologizing for asking such stupid questions, but as my electronic-knowledge is dramatically limited, you are my only hope to get my problem solved.</p>

<p>I'm pretty new to Arduino and my plans are to stack a lcd shield on a motor shield, which is stacked on the Arduino. </p>

<p>My setup would be the following:</p>

<ul>
<li><p>Arduino MEGA2560</p></li>
<li><p>LCD-Shield <a href="http://www.sainsmart.com/arduino/arduino-shields/lcd-shields/sainsmart-1602-lcd-keypad-shield-for-arduino-duemilanove-uno-mega2560-mega1280.html" rel="nofollow">http://www.sainsmart.com/arduino/arduino-shields/lcd-shields/sainsmart-1602-lcd-keypad-shield-for-arduino-duemilanove-uno-mega2560-mega1280.html</a></p></li>
<li><p>Motor-Shield <a href="http://www.sainsmart.com/arduino/arduino-shields/motor-shields/sainsmart-l293d-motor-drive-shield-for-arduino-duemilanove-mega-uno-r3-avr-atmel.html" rel="nofollow">http://www.sainsmart.com/arduino/arduino-shields/motor-shields/sainsmart-l293d-motor-drive-shield-for-arduino-duemilanove-mega-uno-r3-avr-atmel.html</a></p></li>
</ul>

<p>My target is to enter specific values trough the LCD-shield (with its buttons) and to control a stepper-motor related to those.</p>

<p>Now to my question: Can I realize my project with the mentioned parts and are the two shields stackable (with head extentions on the motor-shield) without creating interferences?</p>

<p>Thank you very much for your time and answers in advance.</p>

<p>Best regards,</p>

<p>irie</p>
 337: <p>No, it doesn't look like it.</p>

<p>The LCD board uses digital pins 4-10 and analog 0</p>

<p>The motor board uses digital pins 3-12 if all motors are used.</p>

<p>If you need to stack boards look for boards that use I2C since they can share a single data bus.</p>
