Hi folks, I've noticed a lot of misinformation about people using ferrite (Fe2O3, or commonly referred to as rust) resistors in audio electronics and other electronics. It's actually a horrible choice of material for a resistor. Ferrite is used in antennas! If you want to get hacked offline or to pick up interference from random crap, ferrite is a great choice of material in your resistors.
I think a lot of you are making your own electronics specifically to avoid talentless hacks screwing everything up. If that is the case, you are perhaps better off with some sort of ceramic material for resistors, just make sure your power rating has sufficient watt throughput capability.
The benefit to using ferrite is that the resistors are very small. If you are shielding everything or are not worried about talentless hacks ruining your fun, ferrite is a great choice. Otherwise, choose resistors made out of a different material -- especially if you are in aerospace.
I think a lot of you are making your own electronics specifically to avoid talentless hacks screwing everything up. If that is the case, you are perhaps better off with some sort of ceramic material for resistors, just make sure your power rating has sufficient watt throughput capability.
The benefit to using ferrite is that the resistors are very small. If you are shielding everything or are not worried about talentless hacks ruining your fun, ferrite is a great choice. Otherwise, choose resistors made out of a different material -- especially if you are in aerospace.
@DualTriode That sounds like a recipe for plasmons, if you picked up any stray EM signal, which would be even worse.
Edit: technically, you might could consider Fe2O3 a ceramic, due to formation properties, but I was referring to other ceramics.
Edit: technically, you might could consider Fe2O3 a ceramic, due to formation properties, but I was referring to other ceramics.
Ferrite being used in antennas doesn't mean that it would make an antenna out of anything.
Ferrites are a class of magnetic ceramic materials, whereas Fe2O3 is called ferric oxide (or iron (III) oxide) and is not used in resistors. Rust is a mixture of hydrated iron oxides (including ferric oxide itself).
Metal oxide resistors are usually sintered particles of ruthenium oxide in a glass matrix.
Metal film resistors use nichrome or similar low-tempco alloys.
Ferrites are often used in inductors or ferrite beads (lossy inductors for EMI suppression). Never heard of them being used as resistors though.
So the misinformation seems to be mainly yours ewalkrambo...
Metal oxide resistors are usually sintered particles of ruthenium oxide in a glass matrix.
Metal film resistors use nichrome or similar low-tempco alloys.
Ferrites are often used in inductors or ferrite beads (lossy inductors for EMI suppression). Never heard of them being used as resistors though.
So the misinformation seems to be mainly yours ewalkrambo...
