I'm working on creating a relatively simple project where I'm using an Arduino as a remote garage door opener. Part of this project has a reed switch near the bottom of the door to detect when its closed.
My issue is this requires a pretty long wire run for the switch (probably about 10-15 feet). My dad does a lot of ham radio communications and as such the house has a ton of HF radio being emitted. I'm wondering how I can protect the Arduino from any damaging interference and still reliably detect when the reed switch closes. I found this article but I'm not sure if it'll help me or not. I'm sure I would need a ferrite bead and probably a twisted pair for the wiring but not sure what else I will need to protect the Arduino. Thanks!