Project 1 · Electronics

LED Glow on a Breadboard

Light your first LED with a 9V battery and a single resistor.

Starter 20 min 5 components
LED Glow on a Breadboard wiring diagram

What you'll learn

  • Identify the long (anode +) and short (cathode −) leg of an LED.
  • Calculate why a 220 Ω resistor protects a 5 mm LED.
  • Use breadboard rows and rails to build a clean circuit.

What's in the kit

  • 5 mm red LED
  • 220 Ω resistor
  • 9V battery + clip
  • Half-size breadboard
  • M-M jumper wires×2

Protocol: passive