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Altera_Forum
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11 years ago

Cyclone II max current

I am working on an alarm clock for my semester project. I have 88 leds that i want to drive with the FPGA. I am using the DE1 development board for testing the code. My plan is to switch to the EP...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

You could use an led driver IC. There are plenty of them out there which take a serial input with an internal shift register, and they usually have a serial out for daisy chaining. You can then have just one set resistor per ic to set the led current. Here's an example from ti, TLC5925IDBQR

You can also find some fancy ones that support blinking and dimming.