Hello people,
I'm brazilian and new on arduino world. I've doubts, For exemplo
Where is fixed the Ethernet Shield board in the arduino?
I want open the garage gate that it's 220Volts. Arduino What should I buy?
I want buy the Beginner Kit (Robocore.net), it comes with one Arduino Uno R3, it's good?
And.... How many things can I "turn on" with this arduino?
I want open a garage gate and turn on a lamp, with this same arduino, and more...
Which is the limit?
Hi, and welcome !
If your garage gate already has a remote opener, or a switch on the wall, the typical way to approach this challenge would be to use the Arduino to activate the low voltage switch that already controls the gate. Turning on two devices is well within the capability of the Arduino. Even when you reach the limits of Arduino there are ways to extend those limits, and also there are other models (Arduino Mega) which have greater capability than the standard Uno. So lots of options.
So, does your gate have a button already to activate it?
Geoff
Hi dude, tnks.
So, I haven't gate garage yet. But I'll buy .
Therefore, I want know if a R3 UNO Arduino, can help!
Because, I want open a gate of garage, "turn on" some lamps independents and more, this all with one R3 UNO arduino!
Can I do it?
And with gate of garage, I'll use a "RELÊ". Here in Brazil, us call "RELÊ"
The Relê, go make the energy go to machine ( motor of garage gate), when to get signal of arduino.
The Relê is a interruptor that turn on and turn of the machine.
The Relê need get signal to do it.
Sorry me, to me is a honor talk with others, of others nations. 
My english is good? rsrs'
Tnks, because give me attention. (Y)
Hi
Great chatting with you in Brazil too.
Here we call that a "relay". Depending on the power you need to switch there are pre-built relay shields to suit the Uno R3 which would make your task easier. Once you have your gate and opener you'll be able to work out what needs to be done to switch it to open or closed with Arduino.
All the best with your project, Geoff
I'm Brazilian. Somebody can help me?
No, you're stuck with that.... 
Thnks!
And I like be Brazilian 
JimboZA:
I'm Brazilian. Somebody can help me?
No, you're stuck with that....
What is the difference between the Arduino boards?
JimboZA:
I'm Brazilian. Somebody can help me?
No, you're stuck with that....
You beat me to it, Jimbo! It still deserves a karma++, though.
Yep, beat me as well 
Oh!
JimboZA:
What is the difference between the Arduino boards?
They're all explained here.
I haven't seen. Tnks..
Ok, I haven't a garage gate yet. then I'll learn to program!
Somebody can help to program?