The green led? YOu mean the TX and RX leds?

If you don't need to change dirrection, just get a MOSFET, something like the IRF540N, you will always het it to do what you want it to do.

So are you getting an UNO or a Leonardo?

Do you need to change the dirrection of the motor? If not, just use a MOSFET to drive it. Just Google "motor driver circuit"

Don't get the leo!!! It's SMD! That means if you destroy the chip it's pretty much irreplaceble! I got the expensive mega, and I've ruined it! And I can't replace the chip!

Hi all! I broke my Arduino and haven't yet got a new one, and I got really bored, so I decided to photograph some electronic components. Please enjoy!
http://www.flickr.com/photos/92382393@N06/sets/72157632607079182/

If only you had a branch in Beijing... It sounds so awesome!

Do you live in Beijing?

The led on the servo, on the computer or on the Arduino? If it's on the Arduino, there's a short circuit and you must be very careful or you might destroy your Arduino.

You can make two ICs communicate with I2C, or you can use a shift register/driver IC

I first learned with the book Getting started with Arduino by Massimo Banzi. Great book!

You can solder your own screw shield, it won't be difficult.

http://arduino.cc/forum/index.php/topic,143620.msg1081183.html#msg1081183

This sounds like a nice project. What type of driver are you using? A driver IC, or MOSFETs, or a transistor circuit?

Aw... Sorry to hear that. Don't drop Arduino now you've picked it up though...