Awesome work! We’ve covered a lot regarding electricity and electronics! Let’s recap what we’ve learned so far:

  • Electronic circuits consist of 3 basic elements: An electric source, a load, and a conductive path
  • Voltage is measured in volts (V) and is defined as the amount of electric potential energy between two points
  • Current is measured in amps (A) and it’s the measurement of the flow of electricity through a circuit
  • Resistance is measured in ohms (Ω) and is the measure of the opposition to current flow in an electric circuit
  • Schematics are diagrams used to represent a circuit.
  • Some schematic symbols include, a voltage source, push-button, resistor, and an LED
  • Ohm’s Law, V = I × R, is a fundamental rule of electronics that represents the relationship between voltage, current, and resistance
  • LEDs are used as circuit indicators and allow current to only flow in one direction
  • Forward voltage is the recommended voltage to be applied by an LED with a resulting current known as the forward current

With this knowledge, you will be able to build up a better understanding of more complex concepts that have to do with electric circuits and electronics in general.

Congratulations on completing this lesson!


The schematic in the workspace represents many of the concepts from this lesson. Look at the circuit as a whole and then each component individually. Review the following questions and see what answers you might come up with:

  • What is the source in this circuit?
  • What is/are the load(s)?
  • Is there a representation of the conductive path besides the lines between the components?
  • Is this currently an open or closed circuit?
  • If the circuit is closed, what happens to the current if the resistor value goes up, or down?

Getting comfortable with the concepts of voltage, current, and resistance and how they relate to each other takes time. As with anything, keep working at it and your understanding will increase daily.

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