Topic

protection diode

2 videos. Ranked by independent recommendations, not by views.

1. 

   1 EEVblog #831 - Power A Micro With No Power Pin!

   EEVblog 27 people · 37 months · since Jan 2016

   Demonstrates a microcontroller running through the protection diodes on its I/O pins with the supply pin disconnected; cited whenever a supposedly unpowered chip keeps working.

2. 

   2 ElectroVLOG-002: Fixing my Broken Power Supply

   ElectroBOOM 3 people · 4 months · since Jul 2017

   ElectroBOOM's account of a dead power supply is recommended for explaining how reversed polarity can short a protection diode, a fault one commenter repaired by replacing it.