Recommended · for some experience
#190: Back to Basics: Transistor Current Sources and Mirrors
Why people recommend it
Alan Wolke explains discrete transistor current sources and mirrors, ending with LED driving and compliance voltage; suggested as an alternative to an LM317 current source.
Watch for: compliance voltage demonstration around 16:37
In their words
Transistor Current Sources and Mirrors - A long-ish 18 min Video
Seamus on raspberrypi.stackexchange.com, Sept 2020. CC BY-SA.
There's a vid on youtube by w2aew explaining discrete current sources & mirrors:
got trolled too much this week on electronics.stackexchange.com, Oct 2015. CC BY-SA.
This video ends with a demonstration of driving LEDs with a current source where the limit on this ability is called the compliance voltage:
SystemTheory on electronics.stackexchange.com, Aug 2021. CC BY-SA.
