Duress codes have been around on alarm systems for a long while now. The said alarm needs to be monitored by an alarm / security company and you need to rely on them turning up within an appropriate time frame for it to be beneficial.
If you need to be electronic about it, with a time delay, this would be best used as a duress code on a standalone key pad. So how this would work is that in normal operation with your standard 1234 code the safe would unlock as desired instantly.
If you feel game when threatened to open it you use the 1235 code ( or what ever you dream up as a duress ) this would trigger a seperate timed delay to open when the time expired.
I still dont think it would be a very good idea to piss off the person that has gone to the trouble of invading your home with the specific task to remove your firearms.
Unless its the Police and the delay gives you the chance to call your lawyer![]()
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