I was hoping someone may have some help on my problem. I am using (5) maxim 7219 led drivers each driving an 8x8 led matrix. I am using an Arduino Micro. My question is I cannot get all of them to work. I have them wired together and the first three work correctly but the forth and fifth do not come on. However they do, when I first start the program, all light up all the lights briefly on all 5 and then turn off. The program then works correctly on the first three but then the last two do not. And to clarify, by last two I mean I have them Din to Dout and the last two are the last two in that series. If I connect them in various orders it is always the last two that don't work. Could it be not enough power in the control signal to activate the final two maxim,s in the series?
Thanks for any insite.