Led Positive Side. Learn led positive negativehow to check positive and negative of LED In this video you are going to learn about how to find led positive and negative sidein. LED polarity is the direction of the electrical current through the LED.
Shorter lead = cathode (negative lead). Longer lead = anode (positive lead). LED's do need to be wired correctly or they won't work- your's seem to be clearly marked so it should be pretty basic to hook up.
Obviously, the LED doesn't care which side is switched/regulated.
Regular incandescent miniature bulbs can draw current in either direction, there are no "positive" or "negative" sides on the bulb.
I've always looked at the led itself look carefully and you see both the anode and cathode and the The reliable indication is the flat or notch on the plastic body which is always the cathode side. An LED is a light-emitting diode, and you can usually tell which side is positive by examining the If the pins have been trimmed, examine the outer casing of the LED. A LED has no positive nor negative.