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I'm contemplating using an MCU sitting in my garage to read data from a couple of sensors, one of which may be as much as 10m distant. I'm not using analog sensors, as this questionthis question asks, instead, I'll be using Maxim OneWire devices (used in non-parasitic power mode).

I believe the actual digital signal and power should be fine at these distances (I'll probably use something like CAT5, and I can tie multiple conductors together if I really need to), but I'm concerned about other issues, mainly EMI, and at the top of my list of worries is exactly what happens when lightning strikes nearby? Doesn't this wire act as a large antenna, and could pick up meaningful voltages when lightning strikes?

It may or may not be relevant to state that the wire(s) in question would be run inside the building (in the attic), and not out in the open air. I'm not worried so much about a lightning strike directly on the wire, as I am about the large EMI voltages that could (would?) be generated in the wire upon a nearby strike.

I'm contemplating using an MCU sitting in my garage to read data from a couple of sensors, one of which may be as much as 10m distant. I'm not using analog sensors, as this question asks, instead, I'll be using Maxim OneWire devices (used in non-parasitic power mode).

I believe the actual digital signal and power should be fine at these distances (I'll probably use something like CAT5, and I can tie multiple conductors together if I really need to), but I'm concerned about other issues, mainly EMI, and at the top of my list of worries is exactly what happens when lightning strikes nearby? Doesn't this wire act as a large antenna, and could pick up meaningful voltages when lightning strikes?

It may or may not be relevant to state that the wire(s) in question would be run inside the building (in the attic), and not out in the open air. I'm not worried so much about a lightning strike directly on the wire, as I am about the large EMI voltages that could (would?) be generated in the wire upon a nearby strike.

I'm contemplating using an MCU sitting in my garage to read data from a couple of sensors, one of which may be as much as 10m distant. I'm not using analog sensors, as this question asks, instead, I'll be using Maxim OneWire devices (used in non-parasitic power mode).

I believe the actual digital signal and power should be fine at these distances (I'll probably use something like CAT5, and I can tie multiple conductors together if I really need to), but I'm concerned about other issues, mainly EMI, and at the top of my list of worries is exactly what happens when lightning strikes nearby? Doesn't this wire act as a large antenna, and could pick up meaningful voltages when lightning strikes?

It may or may not be relevant to state that the wire(s) in question would be run inside the building (in the attic), and not out in the open air. I'm not worried so much about a lightning strike directly on the wire, as I am about the large EMI voltages that could (would?) be generated in the wire upon a nearby strike.

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Is it safe to run long I/O wires to a microcontroller?

I'm contemplating using an MCU sitting in my garage to read data from a couple of sensors, one of which may be as much as 10m distant. I'm not using analog sensors, as this question asks, instead, I'll be using Maxim OneWire devices (used in non-parasitic power mode).

I believe the actual digital signal and power should be fine at these distances (I'll probably use something like CAT5, and I can tie multiple conductors together if I really need to), but I'm concerned about other issues, mainly EMI, and at the top of my list of worries is exactly what happens when lightning strikes nearby? Doesn't this wire act as a large antenna, and could pick up meaningful voltages when lightning strikes?

It may or may not be relevant to state that the wire(s) in question would be run inside the building (in the attic), and not out in the open air. I'm not worried so much about a lightning strike directly on the wire, as I am about the large EMI voltages that could (would?) be generated in the wire upon a nearby strike.