To all the electronic nerds out there: I am trying to trigger a 555 timer by movement in a random direction that also occurs randomly and any change in position should trigger the 555. AFAIK tilt switches are not useable here. Does this idea make sense?
Ferrite core In orange, spool in blue.
Would there be a voltage generated by movement if the core is suspended by some kind of spring or rubber band?
The idea being to play a sound from a df mini player by pulling a pin high for 3 seconds.
No, that won't work.
A vibration switch will work.
If that's not sensitive enough, another option is using a piezo element coupled to the case to detect vibration, with an op-amp or hex inverter to buffer + trigger the 555. However if you couple it too closely with e.g. the floor or furniture it will pick up nearby footsteps or cars. Might be good depending on the situation.