Table of Contents
Sometimes it is nice to have a visual indication of which side of a circuit is more positive or negative.
Parallel diodes/LEDs that are wired in opposite directions, will easily pass current in either direction.
However, current will only flow through one diode in one direction, and through the other diode in the other direction.
If those diodes are LEDs, then the LED passing current will light up. If you use different colored LEDs, then you will be able to tell which way current is flowing based on the color of the LED that lights up.
Always protect LEDs with a series resistor, or other means of limiting current.
Video:
Brief Circuit Schematics with Short Video List of Pages
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