Recently, I began work on a adjustable regulated power circuit in search of a short circuit protection / indicator add on. A fellow forum user issued a solution that involved an LM321 as a comparator in the image below:
As a possible solution as a short circuit protector, the output of the LM321 is to be connected to the gate of an SCR. The SCR's anode will be connected to the regulator's adjust pin and short it to ground thus rendering the output of the regulator to as little output as possible. (I'm not sure if the SCR part is relevant to my question yet so I included it's purpose to the comparator for now).
The current design has two LED's. The Green LED is active when the load is within specified parameters. The Red LED will activate when LM321's output is high indicating that Voltage (load) drops below Voltage (ref) or that too much load is present. With the SCR in place, the regulator's output drops off this deactivating the Greed LED. The Red LED will be active. My question is, is it possible to design a bi-color LED (two-lead or three lead) version of this? Any help is greatly appreciated. Many thanks in advance.
Edit: Not sure why this got down voted. Question was pretty straight forward. What was wrong with the question? :/