I have a max7219 based project working perfectly on breadboard with a DIP version of the MAX7219. I had some PCB's made with the same schematic using the SOIC version of the MAX7219. I assembled the first board, it doesn't work and I have no idea where to begin troubleshooting a soldered board so I …

How to troubleshoot max7219?

CrossRoads October 2, 2012, 4:34am 13

What's the code like - any chance things are misprogrammed? Fuses not loaded in the uC?

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