This topic has been moved to Réalisations et Projets Finis.

http://forum.arduino.cc/index.php?topic=167956.0

This topic has been moved to Project Guidance. since it has no code it belongs in the more generic project guidance section.

http://forum.arduino.cc/index.php?topic=167927.0

This topic has been moved to Project Guidance.

http://arduino.cc/forum/index.php?topic=159676.0 since there is no code, this rightly belongs in the project guidance section. Thanks!

This topic has been moved to Project Guidance.

http://arduino.cc/forum/index.php?topic=157563.0 because there is no code in your question, it belongs in the broader category of "project guidance"

Hi Mahmoud,

Welcome to the forum. We will do our best to help you. However, we need more details about your hardware and software before we can help. Please follow the guidelines here to help us help you:

How to use this forum

At the very least, answer the 3 questions that AWOL indicated and we'll see what we can figure out.

Looking forward to schematics, part numbers, and code, and then we'll get to work.

Sincerely,
Michael

This topic has been moved to Software.

http://arduino.cc/forum/index.php?topic=150317.0

This topic has been moved to Generale.

http://arduino.cc/forum/index.php?topic=150009.0

This topic has been moved to Programming Questions.
moved to programming for it is a programming question
http://arduino.cc/forum/index.php?topic=149536.0

This topic has been moved to Products and Services.

http://arduino.cc/forum/index.php?topic=146249.0

This topic has been moved to Nederlands. sorry, i see it was already in the right place

http://arduino.cc/forum/index.php?topic=144444.0

This topic has been moved to Deutsch. We don't seem to have a Dutch section so I put it in German because I thought it might be the most likely understood place.

http://arduino.cc/forum/index.php?topic=144444.0

Please let's not call anyone trolls on the forum. If you have such suspicion, make it to the moderators, not to the forum.

To the original poster: It does appear that you have a lot to learn before you can do a project that is longer than one screen.

I suggest you review all the tutorials you can find on the Arduino or other websites such as

http://arduino.cc/en/Tutorial/HomePage
http://learn.adafruit.com/
http://itp.nyu.edu/physcomp/Intro/HomePage
http://tronixstuff.wordpress.com/
http://todbot.com/blog/spookyarduino/

Study well program structure, do all the exercises and understand them.

When you have done this you are ready to embark on your own project.   Create a MINIMAL test for your LCD project; by minimal I mean code that will fit on one screen. Understand exactly what it is supposed to do, and then if it doesn't work come back here and we'll try to help you.

Best wishes,
Michael

Thanks for the report. We are looking into it.

Or, post in the French part of this forum. (A moderator has moved this discussion there already.)

You can use a voltage divider to scale the voltage from 24 to 3.3 (or anything you wish). You might wish to add a 3.3V Zener diode to assure the voltage can never get above 3.3.