A simple earthquake seismograph - seismometer, EMF coil - magnet pickup sensor

[electrovlog]

Very interesting experiment. That may be an useful idea for an improved version of my pendulum sensor.

[smellanalan]

Wow very impressive! like I said experiments as such are new to me, but that is pretty darn cool seeing the magnetic field using the key chain.

[pyrolytic]

@smellanalan Yes, some magnets possess exceptional magnetic strength and they can be visually

interesting both in what they exhibit, and of course there are many daily uses of magnets we utilize.