Quote:
Originally Posted by tecqboy
Anodes? Cathodes? What's the correct polarity?
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Anode = longer lead, positive voltage
Cathode = shorter lead, negative voltage
To connect 3 leds in series....connect 1st led's cathode to 2nd led's anode, connect 2nd led's cathode to 3rd led's anode. Than connect 1st led's anode to positive (12V) and 3rd led's cathode to negative ground.
Don't forget the current limiting resistor should be connected in series too, but in this case...just swap the onboard resistor to 220ohms.