MAX7219 and 8X8 LED display problem

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hello,

i'm pretty new arduino stuff , not hot on hardware side of things. wanted play around 8*8 display controlled max7219. followed instructable here.

now i've done in tutorial, there leds permenantly on shouldn't be. pic attached taken vcc , gnd connected.

the video here happens when connected.

any ideas what's wrong?

looks led matrix plugged in wrong way. unplug it, rotate 180 degrees , plug in. if not fix problem else (maybe software not initialising properly, have not provided software check).


Arduino Forum > Using Arduino > LEDs and Multiplexing > MAX7219 and 8X8 LED display problem


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