Recommended · for some experience
How to Drive LEDs - Easy Constant Current Circuit
Why people recommend it
Shared as a practical explanation of driving LEDs at constant current with a shunt regulator and a transistor instead of a resistor per LED.
Watch for: Handy for parallel LED strings
In their words
Accordingly, for sourcing current to the rows, I could add a circuit to each of the 595's outputs, consisting of an NPN transistor and a shunt regulator (TLV431) as explained in this video.
tsambou on electronics.stackexchange.com, Nov 2019. CC BY-SA.
