Hi i am trying to do a buffered (Capacitor) multiplexed LED screen. I am using MOSFETs to drive the Anodes and Cathodes (IRF9640 and IRF930 respectivly). The problem that i have is that some LEDs dimly light up unless i put a 35?s delay between the anode switch. I suspect that it's the MOSFETs not …

Fast switching of Power MOSFETs

John_Smith October 17, 2012, 2:25pm 2

The schematic shows the top 4 LEDs will all be switched at the same time, and it doesn't show how the bottom 4 are connected ?

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