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: https://www.youtube.com/watch?v=8nyNamrWcyE 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/eevblog-1409-the-huge-trap-of-inductor-back-emf/ Subscribe on Odysee: https://odysee.com/@eevblog:7 EEVblog Web Site: http://www.eevblog.com/ The 2nd EEVblog Channel: null EEVdiscover: null Support the EEVblog through Patreon! http://www.patreon.com/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: null #ElectronicsCreators #Tutorial #Inductors