Can someone help me to understand how to program the matrix!!! :-?
"The Matrix" ? - Just take the blue pill !
What matrix do you have in mind ? Do you already have it or do you also want to build one ?
i bought the arduino starter kit and it came with a really small one
check this out:
http://www.earthshinedesign.co.uk/ASKManual/Site/ASKManual.html
If you need something with more colors, you can find some info on my blog on how to build that.
The Book, i dont understand any of the code :o
this is a tutorial for a single shift register, the basis for driving a matrix.
You have access to a beginners book, that explains the code, but still don't understand the code?
That earthshinedesign PDF has errors in it. It wasn't until I followed the instructions on the arduino site that the LED's lit up.
It would help us all to know what those errors are. The author is good about updates, too. Can you point out the errors for us?
Sure, for example, take a look at Project 17 - the diagrams for building the 8x8 matrix for example. There are resistors connected to the board that are not connected to anything.
In chapter 15 for example, the wording doesn't match the pin numbers used in the diagram. Not sure if that is what screwed me up but I had to follow the instructions at the arduino site which finally got my shift register working.
In chapter 15 is it this bit you think is wrong:-
A wire goes from Digital Pin 8 to
Pin 12 on the IC. Another one
goes from Digital Pin 10 to Pin 14 and finally one from
Digital Pin 12 to Pin 11.
The Digital Pin 8 refers to the arduino Pin 8 not pin 8 of the shift register.
As to chapter 17 - It is pretty obvious that the resistors have just got shifted over one place and they are supposed to go in line with the wires.
I have had nothing to do with the production of this I just thought it was a good beginners text. Is it the description of how the multiplexing software works a problem? What in that don't you understand.
Thanks Mike, I think maybe that's what I did wrong. It was a while ago. Could have gotten the pins confused. Since I assumed the PDF had errors, I kinda dismissed the entire thing once I got to the chapter 17 as saw that the resistors had no connections going to them. I agree that its obvious that they were shifted on accident but newbies take things like this at face value so I hope they correct it cuz it's a great little PDF and has pretty much everything one would ever want to try with their arduino when first starting out.