@flacs i have one at my parents i could go get, guess would need 2 voltage glitch unless the avr comes unlocked? i never voltag glitched an avr, so I'm hoping it's possible lol
@mini_ninja_64 the docs say it has readout protection and brownout detection, no idea whether either feature was actually enabled (also they're very cheap these days, I see one on eBay for <£6 including shipping)