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I’m looking to create an alarm system (which is basically just a sound played from a speaker that is triggered when a magnetic Reed door switch is broken). However, as this is part of an installation, I’ve set it up so the alarm doesn’t go off even if the door gets closed.

I would like it to work in a way whereby the only way to disarm it would be to power off the Arduino itself. I would like to achieve this by having the user unplug an alligator clip from a contact point. I’m trying to figure out the best way to achieve this - I have one of these YwRobot Power MB V2 Units, so I was wondering if the was perhaps a way to wire up the alligator cable and contact point to this so I can have it power off this way?

Any help would be greatly appreciated.

It’s worth mentioning I’m using an Arduino nano.

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    May be sleep mode will help? instructables.com/A-Guide-to-Putting-Your-Arduino-to-Sleep – Mahmoud Salah May 21 at 9:32
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    I would like to achieve this by having the user unplug an alligator clip from a contact point. I’m trying to figure out the best way to achieve this -- an alligator clip and a contact point? What's so hard about that? Surely you've already described your solution in the question. What's stopping you implementing it? – Majenko May 21 at 16:26

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