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EEVblog 1409 - The DANGERS of Inductor Back EMF

A practical demonstration of Lenz's law and back EMF in an inductive relay coil and how to solve it using a Freewheeling/Flywheel/Flyback/Snubber/Clamp diode. Also the downsides of clamping diodes, and switch arcing supression. Also a look at an AMAZING potential phenomenon you probably haven't seen before! Actually, two rather cool things you probably haven't seen before. Along with transistor ratings, transistor storage current, and Collector-Emitter breakdown voltage, there is a lot to unpack in this video. This is a follow-on from the DC Transients Fundamentals video:    • EEVblog 1406 - DC Fundamentals Part 7...   00:00 - Recap of Relays, Inductors, Faraday & Lenz's Laws 02:30 - Relay Back EMF Explained 07:09 - The Flywheel analogy of Inductors 08:30 - Relay circuit demonstration 12:35 - 700V Back EMF! 14:43 - BJT Transistor Storage Time 17:03 - Back EMF Diode clamp demonstrated 19:06 - An AMAZING demonstration! 24:43 - Trap for young players 25:23 - DOWNSIDES of Back EMF Diodes 28:38 - BONUS cool effect of Back EMF diode DEMONSTRATED Forum: https://www.eevblog.com/forum/blog/ee... Subscribe on Odysee: https://odysee.com/@eevblog:7 EEVblog Web Site: http://www.eevblog.com The 2nd EEVblog Channel:    / eevblog2   EEVdiscover:    / eevdiscover   Support the EEVblog through Patreon!   / eevblog   AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog #ElectronicsCreators #Tutorial #Inductors