The LEDs that I received differ from the picture and description in the shop in that all 4 four pins are the same length. So far the only way I can get the red led to work is to connect the flat side of the ‘bulb’ as anode and the wire next to it as cathode. The other colors do not light up at all no matter what config I tried?
I used the 5V/GRND pins on Arduino with 220R resistor to test …