Backupcpu’s S+V Oscillator
Backupcpu posted a vid yesterday of a circuit that he’d found online. Not only does it just use 1 inductor to create a Joule Thief type LED circuit, but you can hang a mains transformer off the end !
This is my version/replication with slightly different parts that were on hand. I was surprised to see it do so well with the LED nightlight and intend to upgrade to power transistors for larger loads in the near future.