I’ve seen Mr. Nick’s Videos of the awesome 16x16 RGB Matrix on youtube and wanted to build my own. I’ve started with Arduino and ethernet shield programming and had no problems to get into the software side. On the hardware side it’s a totally different story to me. Since I unboxed first Matrix and Rainbowduino a few hours ago there are only question marks where my head used to be.
First of all I set the Matrix on top of the Rainbbowduino and connected a 5V power supply. Since I lack the connector for the white socket I used the green ones instead. The red LED on the Rainbowduino lights up, but I don’t get a rainbow pattern, LEDs on the Matrix don’t light up at all. I’ve turned the Matrix the other way around, still nothing. Is that normal when powered via the green socket, or is there something wrong with my Rainbowduino? I don’t think I had any opportunity to fry the board, is it just not programmed?
In case I get this thing to work at all, I’ve got another question: What is the easiest way to hook up a Rainbowduino to control it via a Arduino? I understand, that theres a ATMEGA on the Rainbowduino, but since I want to make use of the ehternet shield in my project all I want the Rainbowduino to do is to take Raw data and print it on the matrix. Is the serial interface the right solution to this, and is that possible without reprogramming the Arduino? For the serial, could someone point me to a wiring diagram, i just don’t know what to connect where and how. Also, is there at least a small sample sketch to do so?