What was the first electronic component you played with? It was probably a LED. They’re fun to blink in patterns or learn to fade. Most projects (and products) use them for useful indicators.
The most common mistake is to use a LED without a current limiting resistor.
For this video, we look at how LEDs and Resistors work individually. Then we hook them up together in a simple circuit.
We even go into the lab to get help from a couple of multimeters to see what happens when you do and don’t use a current limiting resistor.