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20pcs 5mm Led Common Cathode Rgb Light Emitting Diode Common Anode Red & Green F5 3pin 4pin Transparent/fog Positive Negative - Diodes - AliExpress
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LED Polarity: Why does this LED have the anode as the short pin? - Electrical Engineering Stack Exchange
![I saw someone attach a resistor to a cathode, so why does attaching a resistor to a cathode still stop an LED from burning out? Why doesn't the full current still hit I saw someone attach a resistor to a cathode, so why does attaching a resistor to a cathode still stop an LED from burning out? Why doesn't the full current still hit](https://qph.cf2.quoracdn.net/main-qimg-9931909f947e7b734d0f0796b75f0908.webp)