Well done!  Very small despite the constraints of using LEGO pieces.  I'd like to build one and I tried to go to bricklink.com to find the LEGO parts that I need but quickly got overwhelmed.  Any tips on finding and buying specific LEGO pieces? Thanks in advance.

I've recently completed two LED cubes.  They're only 4x4x4.  Lame compared to the 8x8x8 or even larger cubes out there, but I had a lot of fun building them and I thought this would inspire others to build their own.  It was a lot of work, but very rewarding.  I don't recommend it as a first Arduino project, but if you've had one or two projects under your belt, you may want to try these.  If you've built one, maybe you can post a link/video on this thread.

4x4x4 Single-color LED Cube

More info at my blog

Charlieplexed 4x4x4 RGB LED Cube

More info at my blog

WOW! Reasonable shipping too.
Thanks CrossRoads!

I love SparkFun, but I need tons of these for a project and $0.95 a piece seems a bit overpriced.
Can someone help me find this part at Mouser/Digikey so I can compare prices?  Thank you in advance!


http://www.sparkfun.com/products/8432

Thanks for all the quick pointers.  Although searching for veroboard at digikey and mouser did not return meaningful results, I've ordered these:  http://futurlec.com/ProtoBoards.shtml

Quite inexpensive and available in many sizes and variations.

For future hunters, I've seen these boards called: protoboard, veroboard, euroboard, stripboard, busboard.

Etching my own custom board and drilling all the holes seems daunting, so I'm considering this:

http://www.mouser.com/ProductDetail/BusBoard-Prototype-Systems/BR1/?qs=dhMlBWDyGwd3hHrWdzxHJA%3d%3d

Could anyone point me to other (better/cheaper) protoboards? I'm in USA.  Thanks in advance!

Without seeing the rest of the code, I can't figure out what you're trying to do.

The compiler did not yell at you on the switch and case, so I presume ch is really a char and not a Servo object.

That is why the compiler pukes on ch.write.  Unlike a Servo object, a char is not even an object and therefore it does not know how to write itself.

You probably meant something like this:
Servo myServoArray[4];

myServoArray[ servoIndex ].write(v);

If you post more complete code, we can try to help you further.

Wow, good puzzle.
Can you share the circuit and sketch?

My guess is that the circuit is not 100% compatible so you're getting inconsistent signal.  I successfully use my Arduino to play "notes" on my MIDI synthesizer using this circuit.  There are links to MIDI resources that I found useful on that post as well.

I noticed that sometimes the Arduino IDE would randomly destroy my code in the editor.  It could be as harmless as changing number of spaces between functions, or as bad as renaming my variables or missing code chunks.

It turned out that everytime I press the Serial Monitor keyboard shortcut: CTRL+SHIFT+M

Not only the Serial Monitor would open, but Arduino IDE also types a Carriage Return character WHEREVER my selection happens to be!  If I have code selected, it would be removed and replaced with a return.

Not cool... :-(

I'm running Arduino 0018 on 32-bit Windows Vista Ultimate.

I presume the reason the IDE automatically closes Serial Monitor window is to shield us from seeing all the scary bits going in/out from/to the Arduino.

It would be nice, however, if IDE would automatically re-open the Serial Monitor window when upload is done, or better yet, keep the window open but disable the textbox and buttons during uploads.

Not that big a deal now there's a keyboard shortcut (Ctrl+Shift+M) to re-open Serial Monitor, but it would be nice to have the Serial Window remain open during the debugging cycle.

Hi,
I tried putting both transmitter and receiver pde in one folder.
IDE yelled at me for having two setup().  :-(

I think I will stick with const and just maintain them in both pde.  I need to accept that in embedded programming I cannot code defensively.

Thanks for your suggestion.

I got enums to work after reading this:
http://www.arduino.cc/playground/Code/Enum

But, I still have questions  :-?

1. So far, I've been creating new .h elsewhere with NotePad and then adding it to my sketch folder via Sketch > Add File... which would more it to the correct place and make it visible as a tab.  Is this really the best way?!

2. I'd like to share enum between two sketches (one is a transmitter, the other a receiver).  How do I do this without duplicating the .h ?  Creating a library seems overkill for a very specific enum.

3. Would I be better off combining both sketches and set a #define to choose whether to compile the transmitter or receiver?

Just a simple typo:
You need parentheses when defining functions even when they have no parameters, so you need setup() and loop().

There is also a typo on the last two lines of setup(), ledpin12 and ledpin13 are mistyped.  Computers are picky that way. ;-)

Yes, that should work fine.  Let me know if you run into other issues.

I have that RF pair and here is a snippet from my sketch that I know works:
char *msg = "012";
msg[0] = x;
msg[1] = y;
msg[2] = dir;
vw_send( (uint8_t *)msg, strlen(msg));

As you can see I am sending three characters, to send just one you can modify it like this:
char *msg = "0";
msg[0] = PWMVAL;
vw_send( (uint8_t *)msg, strlen(msg));

As far as the garbage characters, make sure that the baud rate selected at the bottom right of the Serial Monitor window matches the one you specify in Serial.begin(9600);