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Projects, Designs, and Technical Stuff / Re: digital RGB LED question
« Last post by glenenglish on Today at 09:37:25 pm »harmonics maybe might have made EMI worse, it depends on their amplitude, which might depend on the cable characteristics, the driver characteristics, the load characteristics...
problem 1-
the lack of sharp edges mean the link is unreliable (those chips need square waves). long periods in the transition region leads to (even poorer) RF immunity
problem 2-
signals in the broadcast band on unshielded cables are radiators and likely cannot meet CISPR25 etc emission requirements, and are likely to cause harmful interference to you and your neighbour's listening of the radio.
problem 1-
the lack of sharp edges mean the link is unreliable (those chips need square waves). long periods in the transition region leads to (even poorer) RF immunity
problem 2-
signals in the broadcast band on unshielded cables are radiators and likely cannot meet CISPR25 etc emission requirements, and are likely to cause harmful interference to you and your neighbour's listening of the radio.