The Breadboard – LED circuit

The Breadboard is a excellent tool for prototyping circuits and learning about electronics without having to solder circuit boards. The breadboard is made up of many small holes tied together with metal clips. The following video will show you how to use a breadboard and show you what it is made up of.



  1. Identify the LED, 330 Ohm Resistor, and Battery Power Supply (see parts list)
  2. Before starting ensure power supply is not connected
  3. Use the Fritzing Breadboard Layout and Schematic Diagram images to connect the components with prototyping wires.
  4. Double check circuit before connecting battery power supply.
  5. Record findings in learning journal.

Diagnosing problems:

  • If any component is getting hot disconnect the battery.
  • Ensure a resistor is used in the circuit or LED will be burned out and damaged
  • Ensure LED positive leg (longest) is connected to positive side of circuit
  • Check battery voltage with multimeter in Volts DC mode
  • Try a different LED in case it has been burned out (ensure you are using a resistor!)
  • Look at breadboard picture bellow and ensure all connection are correct.

Parts List:

Part Qty Name
VCC1 1 4.5V – 6V Battery Supply
R1 1 330 Ohm Resistor
LED1 1 Red LED 5mm

Fritzing Breadboard Layout and Schematic Diagram:
Breadboard test circuit fritzing

schematic test circuit fritzing

Image of internal breadboard connections:


Extra Teaching Material:

  • Does the circuit work if the LED is flipped 180 degrees?
  • Try dismantling the circuit and use the schematic diagram to layout the same circuit in a different location on the breadboard.


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Finished? Now lets checkout The Resistor

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