![header-lesson-03](assets/header-lesson-03.png)

# Objectives

By the end of this lesson, you will be able to...

> - Identify and describe the function of GPIO pins on the micro:bit.
> - Explain the roles of LEDs and resistors in a circuit.
> - Apply Ohm’s Law to calculate voltage, current, and resistance in simple circuits.
> - Construct complete and incomplete circuits and understand the differences between them.
> - Program a micro:bit using MakeCode to control the blinking of LEDs.