6 ms·
It's probably coil whine? https://en.wikipedia.org/wiki/Electromagnetically_induced_acoustic_noise https://en.wikipedia.org/wiki/Electromagnetically_induced_ac.
by bsmith0 5y ago
It's probably coil whine? https://en.wikipedia.org/wiki/Electromagnetically_induced_acoustic_noise https://en.wikipedia.org/wiki/Electromagnetically_induced_ac...
- bcaa7f3a8bbc 5y agoUsually it's inductor coils and transformers, occasionally it's ceramic capacitors (all grades other than NP0 are microphonic, SMD or not), both problems are common in switched-mode power supplies, for example, powering the calculator LCD. I've never seen a singing resistor, very unlikely.