Yeah that's what I was thinking. But a lot of the tilt switches seem to be normally closed, and I'm not sure if they are on/off or if they're more of a sensor with a change in resistance. I mean the mercury ones and ball bearing ones obviously are just on/off and work either way depending on how they're mounted.
All the stuff is pretty cheap so I could get a bunch of different things and mess around with them to find what works best.
I've made a new thread for the kill switch.
@Atomic_Charge @gearheadgirl27
This project is a follow up to the last of @Atomic_Charge 's challenges where I put on my tin foil hat and put together an ultra paranoid encrypted NAS .
For this project I'm building a physical kill switch/intrusion detection system which will shut down or reset the NAS if it is tampered with. If paranoid mode is enabled this will cause it to lock the disks so that an attacker can't access the data, if paranoid mode is disabled the system can be brought back online and the disks unlocked automatically.
Yes I know this is a terrible idea, I know that if there's one thing worse than full disk encryption for unrecoverable data loss it's full disk encryption with sudden power loss. Shhh.
So the plan is to have a mercury switch that will detect movement of the case, and a micro switch which will detect when the side panel is removed. There will also be a hidden arm/disarm switch, because otherwise it's going to be a total pain in the arse. Now I know a little bit about electronics, but not a whole lot, so I'm not going to build this in to the power supply which would be a much more reliable option. Instead I'm going to connect it to either the power or reset switch connectors on the motherboard, as either way it will trigger a lock down of the disks if the system is in paranoid mode (for anyone unfamiliar with the previous project, when in paranoid mode the servers will ping each other every minute to see if they're still connected and lock the disks if they're not, so a reset or shutdown will trigger that).
Thanks a lot to @Th3Z0ne for helping me out with the plan, and thanks for this helpful diagram:
[image]
Initial testing
I'm still waiting on some of the parts to come from china, all I have so far are the relays, some wire, and a micro switch I stole from work. So for now I've just thrown something together to see how it will work and refine the plan.
[image]
For testing I have the vibration sensor connected to the…
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