You can catch enemy spies in the act of touching your stuff by building a motion alarm with a vibration switch, Gemma M0, and a piezo buzzer! Any time it is moved enough to trigger the vibration switch, it will sound the alarm!!

1 x Gemma M0
Small, round microcontroller
1 x Piezo Buzzer
Fully enclosed
1 x 3x AAA Battery Holder
with On/Off switch
1 x AAA batteries 3 pack
Alkaline power
1 x USB Cable
6” A/MicroB

You'll also need three M3 x 8mm screws and four nuts to attach parts to the Gemma M0.

This guide was first published on Mar 15, 2018. It was last updated on Jul 15, 2024.

This page (Overview) was last updated on Mar 08, 2024.

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