Interference from Light Switches.

Hello Everybody, First post on this forum. I have an unshielded cat 5 cable connected to a magnet sensor. I'm getting interference from a light switch near it. I'm adding a delay so the sensor needs to be closed for a period of time to try and avoid the interference. Does anyone know what delay should i set this to?

You'll have to determine that experimentally... How long of a delay do you need to ignore the noise, and how long of a delay can you live with? (Only you can answer those questions.)

If you have 60Hz power you need to start around 17mS and go up. For 50Hz, it's 20mS

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magnet sensor

What is it?
Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?

Thanks.. Tom... :slight_smile:

Thanks for the replies. I just have a cheap magnet sensor from china, sorry I'm in over my depth a bit here. Before I saw these results I had tried 50ms just as a starting point and i haven't had it happen since. Judging from tinman13kup's response that should be more than i need so I'm going to leave it for now. Thanks again for the replies, it tells me I'm at least not crazy with this as a solution. I may come back to this thread in a few weeks if it does start acting up on me again though.