In this guide, we'll learn what a *Relay* is, why we might use one, how to choose a Relay, and finally how to use one with a *Raspberry Pi Pico* .
Note: Not all Relays are compatible with the Raspberry Pi Pico or other 3.3V devices. The 5V Relay Module we are using is compatible with 3.3V power and logic. If you are following along with a different Relay, please check the product page/datasheet to confirm it is 3.3V compatible and that it will work with this guide.
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0:00 Intro 1:06 Poles and Throws Explained 2:28 Why and When to Use a Relay 3:54 How to Choose the Right Relay 4:43 Connecting a Relay to a Rasberry Pi Pico 6:39 Example 1 - Controlling an LED 7:38 Example 2 - Controlling a 12V Fan 8:44 Example 3 - Normally Open vs Normally Closed 11:22 Conclusion
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