An Intro to Ohm's Law for Makers (covers resistor choice for LEDs used with a Raspberry Pi Pico)

A brief introduction on how to use Ohm's Law to determine the right resistor size for an LED bulb driven from a GPIO pin. This isn't meant to be an exhaustive intro to Ohm's Law, but hopefully this is a solid first step, and a better approach than the "rule of thumb" that recommends 220 ohm resistors for most single LED GPIO projects. We mention a Raspberry Pi Pico in this project, but the rules here apply to most microcontrollers. And you'll learn how to lookup values for performing a calculation to choose the right resistor type (Ohm's Law) from information provided by a component vendor.
This is part of Prof. John Gallaugher's Physical Computing course. You can find more info on the course at gallaugher.com.... All lessons are online and free to be used by anyone. If you use them, let me know!

[@cyber778]

finally!!!! someone that DOES just skip and say "let's put a resistor here and now to the next step"

[@Videogame9559]

I've built a magic mirror but I am stuck on raspberry pi pico board