Anatomy of an LED

Chapter: 3 — Breadboard Wiring and Electrical Fundamentals

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About This Poster

A close-up labeled view of a standard through-hole LED, so students can confirm anode/cathode polarity by sight before wiring one into a circuit.

How to Use

• Explore — hover or tap a numbered marker to read about that part.
• Quiz — test whether you can identify each part from a visual hint alone.
• Edit mode — open main.html?edit=true to drag markers and recalibrate positions once the poster image is generated.

Labeled Structures

1. Epoxy Dome (Lens)
2. Flat Edge (Cathode Flag)
3. Anode Lead (Long Leg)
4. Cathode Lead (Short Leg)
5. Semiconductor Die
6. Reflector Cup
7. Lead Frame