2.21 Relay Module¶
In this lesson, you will learn about Relay Module.
In this example, we use Power Supply Module to power the load，use LED as an example.
You can open the file
2.21_relayModule.inounder the path of
Or copy this code into Arduino IDE.
Once the codes are uploaded to the Mega2560 board, you can see that the Relay Module controls the closing and breaking of the external circuit, which will change its working state a second. For detailed code explanation, refer to 1.2 Digital Write.