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Reply to "A Handy Little PCB for Adding Marker LEDs to a Hood Diesel"

Well, actually connecting them in parallel with anode to cathode on each side would do what you describe, and is a recognized way of allowing the one LED to protect the other one from excess reverse voltage.  After all, they are Light Emitting Diodes!  The emphasis is on diode, the conducting diode prevents the reverse voltage from rising above the fairly low reverse voltage specification of the LED, typically from 5 to 7 volts.

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