The Switch – The Flow

The Switch is one of the most basic electronic components and most people would use a switch many times per day. Switches can be found in many different configurations and physical sizes but all switches the flow of electricity when they are closed and stop the flow of electricity when they are open.



  1. Identify all components required from parts list and assemble the circuit following breadboard layout and schematic diagram.
  2. Press the push button switch and you should see the LED turns on.
  3. Think about how the switch works and what it is made up of.
  4. 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
R1-3 1 330 Ohm Resistor
S1 1 6mm Push Button Switch
LED1 1 Red LED 5mm

Fritzing Breadboard Layout and Schematic Diagram:
Push Button Switch Circuit

Push Button Switch Schematic


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