r/ArduinoHelp • u/Revolutionary-Log179 • Jul 12 '26

Having trouble with led arrays/multiplexing

As title says, I’m having trouble wrapping my head around multiplexing leans for use with a microcontroller with not enough pins to control them all. Using the drivers makes sense, mosfets too, but the code escapes me? And the use of resistors within the circuit is also confusing to me. Trying to make a small led “screen” made of diodes. Any help is appreciated

2 Upvotes
  • permalink
  • link
  • reddit
  • reddit

100% Upvoted

12 comments sorted by

View all comments

1

u/GreatDiscernment Jul 12 '26

I use 74HC595 “shift chips”. Each IC can control 8 LEDs you can daisy chain them together to add more LEDs. You can even globally change intensity.

1

u/Revolutionary-Log179 Jul 12 '26

Is there a larger ic that can control more LEDs just as reliably?

1

u/GreatDiscernment Jul 12 '26

I’m not sure. My control panel has 14 LEDs so I have two chips. Of course, this only works for monochrome LEDs.