Objective: I will teach you how to activate an LED with an magnetic.
Step 1: Materials
5) any power source(you can use the Arduino)
Step 2: Instructions:
Then, connect the mini reed to the negative end of the protoboard.
Step 4: IT'S DONE!!
(Sorry if you can't see anything in the photo, it's really difficult to take a photo with an LED on!)
If you have any questions, just ask me in the comments.