Workbench Skills Part 7: diode mode — test an LED and find its + leg

Which leg of an LED is + ? Your multimeter can tell you! 🔦🔍

1️⃣ Turn the dial to the DIODE symbol (often shared with the continuity beep).
2️⃣ Red probe on one leg, black probe on the other.
💡 The right way round, the LED glows a little and the meter shows about 1.6–2.0 V (red LED; blue / white ≈ 2.6–3.2 V).
✅ Then the RED probe is on + — the anode, usually the longer leg.
❌ Swapped? No current flows and the meter shows OL.
(The minus side, the cathode, often has a flat edge on the LED's rim.)