Design and Build a PCB - SMD LED Learn electronics engineering

The video tutorial explains how to create a 3V power supply using 1.5V batteries and discusses the use of SMD LEDs for a circuit board. It covers handling SMD LEDs, identifying their polarity, and selecting appropriate components. The tutorial also details calculating resistor values to prevent LED burnout and assembling the circuit on a PCB, including component placement and connections.

How do you calculate the required resistor size for the LED circuit?

What is the significance of the tolerance rating of a resistor?

Describe the process of connecting the components on the circuit board.