3-axis electromagnetic coil probe
Description
This is a supporting frame for three perpendicular electromagnetic coils as a handheld probe. This device may be useful for * detecting/measuring electromagnetic interference (EMI/RFI) * electroacoustic music The different orientations of the coils mean that a field of any polarization will be picked up by at least one of the coils. (Note that this is no longer the case if you then sum/mix the output signals because there can then be phase cancellations.) For sound-related purposes, they also allow for collecting multiple timbres and stereo effects. Quick demo: [picking up noise from a cordless screwdriver.](https://www.youtube.com/watch?v=7gR-ICs26C8) Also on GitHub: https://github.com/kpreid/3dp-3-axis-coil
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