I have an LCD screen and I wired it up to my Arduino and loaded the "Hello World" sketch to my Arduino and this is gibberish appeared on the screen. The picture is on my blog: http://habibifier.blog.com/2012/08/13/lcd-problems/
What is the problem and how do I fix it?
Thanks so much!

Thank you so much for your help!

Do I have to use a shield? Is there a bare-bones way to do it?

Hey Magician,
    Sorry I didn't see your post of the hacked RC car. What I mean by hacked is that it is bare bones-just the chassis and the motors. So I don't think it has an H-bridge.
Thanks

Thanks sooooo much.
How do you add a voice module? Is it some sort of speaker? I heard there's something called a piezo, is that it?

Thank you so much!

So can I use a transistor to make negative positive and positive negative to make to motor spin to other direction?
Thanks so much and sorry if this question seems silly

So does a transistor reverse the polarity?

I am building an Arduino controlled robot-car with a hacked RC car, I heard there is a way you can reverse polarity on the PWM pins to change the direction the motor spins. How is that done?
Thanks so much.

I have a two character common cathode 7 segment display. How does it work?
Sorry if this question seems a little basic, i'm an amateur. Thanks