http://www.radioshack.com/product/index.jsp?productId=3111494

Thats the switch I have.

So do I need to use the relay and the fuse thats under the hood.  They both still work.  I believe it was a 30a fuse but could be 10a.  I'm hoping the fuse would be all I need, what you think?  Thanks alot for your help.

P.S.  I also believe I have to get a 16g wire or bigger, sound right?

I bought a 12vdc 30a spst switch.  I'm wanting to hook it up to my car battery and use it to turn my radiator fan on and off.  Do I need something in between the switch and battery?  Thanks for your help

I know how to charlieplex and it would be really cool to do but it wouldn't work for a cube.  The wires would be a complete mess and I'm not evern sure if you can even make a cube that way, but be interesting to see if someone come up with a way.

I thought by having the led turns on 1 at a time wouldn't exceed the board ma.  Could someone explain that to me please. I'm also going to be using resistors.  

I never used shift register so do you know a good tutorial or explain it a little on how I might use it and hook it up please.

I know you can use the arduino alone to make a 3x3x3 led cube since it only use 12 pins but what about a 4x4x4 led cube?  It would take up 20 pins which would be every single pin on the board and far as I knew you must avoid using the TX and RX pin.  I just wanted to know if it was possible or would cause issues if I were to use all pins.  I know you can get an MAX chip to do this instead of using all the pins, but I just wanted something for now so I can mess around with until I can get the MAX chip in the future.

Aren't photo-transistors better to use with some IR led?

sorry what I meant

I must say I would go with some shift register. After I just started using them a day ago I can't believe how awesome it is.  The code is also very simple, just use 8 bit binary. So make a table like

Code:

byte zero =  B11111100;
byte one =   B01100000;
byte two =   B11011010;
byte three = B11110010;
byte four =  B01100110;
byte five =  B10110110;
byte six =   B00111110;
byte seven = B11100000;
byte eight = B11111110;
byte nine =  B11110110;

This might also be of some help if you still need it.

http://itp.nyu.edu/physcomp/Tutorials/ArduinoBreadboard

The best one I ever came across:

http://itp.nyu.edu/physcomp/Tutorials/ArduinoBreadboard

Fritzing is used to get everything to look nice from a breadboard onto a PCB.  It does suck that it does lack the simulator function though.  Since I'm running Linux I would have no need for virtualbox since the Wine program install window software usually easy sometime.  I didn't want to have to go through the mess to do it but guess I will try it out for now.  Thanks

This have a really cool PCB program you can use for the arduino.

http://fritzing.org/

Does anyone know how to get the Virtual Breadboard onto linux or maybe something exactly like it.

http://www.virtualbreadboard.com/

P.S. Other then using Wine, thank you.