No, diodes won’t protect your circuit

In this video I show why the classic dual-diode clamp fails when input current gets injected into the regulator rail under certain circumstances and suggest alternative solutions. Timestamps: 00:00 Intro 00:34 Issue with the classic 2-diode protection 01:57 I destroyed my Arduino to prove the point 02:36 First alternative 03:32 Second alternative 04:18 Third alternative 05:04 Final comparison 05:36 My thoughts on why the Arduino burned so violently