A follow up to the previous video on repairing the heater. A viewer asked how the capacitor diode rectifier gave a 24V output. The key is in the zener regulator, so this vidoe looks at how mains powered zener voltage regulators work, and their limitations. X class capacitor and self healing. Zener diode tutorial video: https://www.youtube.com/watch?v=O0ifJ4oVdG4 Dodgy Dangerous Repait video: https://www.youtube.com/watch?v=myqiqUE00fo Forum: https://www.eevblog.com/forum/blog/eevblog-1482-mains-capacitor-zener-regulator-circuit/ Support the EEVblog on: Patreon: http://www.patreon.com/eevblog Odysee: https://odysee.com/@eevblog:7 Web Site: http://www.eevblog.com/ EEVblog2: null EEVdiscover: null 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 #Zener