Yup that's what I did in my toy-project: https://steve.fi/Hardware/washing-machine-alarm/ https://steve.fi/Hardware/washing-machine-alarm/ I tried using a mic

Yup that's what I did in my toy-project: https://steve.fi/Hardware/washing-machine-alarm/ https://steve.fi/Hardware/washing-machine-alarm/ I tried using a microphone at one point too, but that was not as reliable as just taping a sensor to the back of the machine and alerting after movement stopped.