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Some of these projects are pretty dangerous but phun to think about.

https://cdn.preterhuman.net/texts/government_information/intelligence_and_espionage/homebrew.military.and.espionage.electronics/servv89pn0aj.sn.sourcedns.com/_gbpprorg/mil/index.html

This is their section on lockpicking.
https://cdn.preterhuman.net/texts/government_information/intelligence_and_espionage/homebrew.military.and.espionage.electronics/servv89pn0aj.sn.sourcedns.com/_gbpprorg/mil/lock/index.html

Haha, yeah I first saw that site years ago.

One project I saw once that genuinely did look dangerous, was a 'death ray' someone made from a microwave oven. Old-school radio valves (tubes) were involved as well. Hoohoo, don't try this at home kids.

Microwaves of the strength in a household microwave oven are probably not gonna be dangerous for anything except possibly your eyes and reproductive organs unless focused. Which are bad enough I suppose but I'd be more worried about the HV supply for the magnetron. Around 2kV @ 500mA or more - an arc from that is blindingly white and melts anything in its path. Plus in the typical magnetron driver circuit you have a big capacitor - perfect for blowing a finger or hand off.