michaelblock posted:I don't understand why CJACK on 1/13/2019 needs diodes and resistors for LED's while GunrunnerJohn just needs a resistor. Is it because GunrunnerJohn is using a bi-color 2-pin LED?
I posted a schematic of what Lionel uses in their controllers. And yes, if you use a bi-color 2 pin LED, you just need a resistor to limit the current...you do not need diodes to steer the current to the proper color LED.