#183: Why diodes are used around relay coils: Back to Basics on flyback or snubber diodes

We’ll chat concerning exactly how and also why precariously high voltages can be created from the collapse of the saved magnetic power in the coil when they’re changed off, as well as just how the diode can secure the reduced power electronic devices from being harmed by these high voltages. Some voltage and also existing dimensions are made on a real circuit to see the real-world results.
http://www.qsl.net/w/w2aew//youtube/Diodes_around_relay_coils.pdf