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Altera_Forum's avatar
Altera_Forum
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16 years ago

Electronics Newbie question concerning LEDs

Hi all, I am an electronics newbie, and I am trying to design an guitar that has a light up fretboard. To do this I need to control about 120 individual, single color LEDs, and I am having trouble...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

I have a question:

usually, when ever I sow LEDs driven by FPGA, the IO pin was connected to catoda side (sinking the current) and the current strength was determined by a series resistor, so '0' closed the circuit and '1' opened it.

wouldn't this scheme enable him to drive all 160 LEDs at once?