Re: Bi-Polar Red /Green LEDs in Control Panels.


Max is absolutely correct in that it is current.  If we are talking about a single 2 wire LED that is red when current flows in one direction and green when it flows in the other then it is the fault of the maker to not balance the brightness.

A work around would be to use a different resistor for each direction.  Connect each resistor to a diode in series.  Now connect the resistors and diodes in parallel with the diodes pointing in opposite direction.  Now the current only flows through one resisotr for each polarity.  Now swap out one of the resistors until the brightness is correct.

Best Regards,
Ken Harstine

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